Based on a random sample of 50 students, the 90 percent confidence interval for the mean amount of money students spend on lunch at a certain high school is found to be ($3.45, $4.15). Which of the following statements is true?
answer choices
90% of the time, the mean amount of money that all students spend on lunch at this high school will be between $3.45 and $4.15.
90% of all students spend between $3.45 and $4.15 on lunch at this high school.
90% of all random samples of 50 students obtained at this high school would result in a sample mean amount of money students spend on lunch between $3.45 and $4.15.
90% of all random samples of 50 students obtained at this high school would result in a 90% confidence interval that contains the true mean amount of money students spend on lunch.
Approximately 45 of the 50 students in the random sample will spend between $3.45 and $4.15 on lunch at this high school.

Answers

Answer 1

The right answer is that a 90% confidence interval containing the actual mean amount of money kids spend on lunch would be produced by 90% of all random samples of 50 students collected at this high school.

It is given that the 90% confidence interval for the mean amount of money students spend on lunch time at a high school is ($3.45,$4.15)

A 90% confidence interval interprets that, 90% of the random samples will result in a 90% confidence interval that contain the true value of the population parameter.

In other words, 90% of the random samples of 50 students obtained at this high school would result in a 90% confidence interval that contains the true mean amount of money students spend on lunch.

Thus, the correct answer is option (D) or The right answer is that a 90% confidence interval containing the actual mean amount of money kids spend on lunch would be produced by 90% of all random samples of 50 students collected at this high school.

To know more about confidence interval click here:

brainly.com/question/24131141

#SPJ4  


Related Questions

Which of the following statements about quadrilaterals are true? Select each correct answer. Responses All squares are rhombuses, but not all rhombuses are squares. All, , squares, , are, , rhombuses,, , but, , not, , all, , rhombuses, , are, , squares., EndFragment, Opposite angles in a parallelogram are congruent. Opposite, , angles, , in, , a, , parallelogram, , are, , congruent., EndFragment, The diagonals of a rectangle are perpendicular.

Answers

All of the statements about quadrilaterals that are true include the following:

A. all squares are rhombuses, but not all rhombuses are squares.

B. opposite angles in a parallelogram are congruent.

What are the types of quadrilateral?

In Geometry, there are different types of quadrilateral and these include the following:

ParallelogramSquaresRectangleRhombusTrapezium

Generally speaking, a typical characteristics of all squares are rhombuses is simply that all squares are classified as rhombuses, but it is not all rhombuses that are classified as squares.

Additionally, the opposite angles of any parallelogram are always congruent because they form parallel lines. However, the diagonals of a rectangle, parallelogram, and trapezium are not perpendicular.

Read more on quadrilateral here: https://brainly.com/question/10269473

#SPJ1

I am a 3 digit number All of my digits are even numbers greater than 1 My hundreds digit is greater than my tens digit My tens plus mu hundreds digit is equal to my ones digit you can get my tens digit if you multiply a number by 3. What number am I

Answers

HE hundred digit less than the tens digit ,the tens digit is has to 9 .This is because of 9is the only positive integer less than 10 and only it also greater than 8 in one digit numbers. result when 8 is subtracted from it.

What is meant by positive?

When you have an optimistic outlook on life, you have optimism and confidence and focus more on the positives than the negatives.

Be optimistic about the future and carry on with your normal life.

A positive person chooses to focus on the positive aspects of their life, finds delight in the little things, and adopts the mindset that while there are many things outside of their direct control, they can select what they choose to give their attention to.

According to one idea, having a positive outlook makes it easier for you to handle stressful situations, which lessens the negative consequences of stress on your body's health.

we already know that ones digit is 5 less than the tens digit, so it is 9-5=4,and the hundreds digital has to be 1, so the answer is 194.

so, let we can solve it as by the problem,

by the problem

units will be considered as a x

ok

x greater than or equal 9

tens digit digit is more than 5 units

we know that,

so, tens digit value is 9

hundreds digit value is 1

let we find ones digit value x+5<=9

x<=4

hundreds digit is less than

x+5

x+5-8>=0

x-3>=0

x>=3

>3=4

thus the x is 4

then the number is 194

To learn more about positive refer to

brainly.com/question/26072458

#SPJ1

The Treasury Department auctioned $26. billion in 3-month bills in denominations of $10,000 at a discount rate of 5.250%. What would be the effective rate of interest? Note: Use calendar year. Do not round intermediate calculations. Round your answer to the nearest hundredth percent. Effective rate of interest %?​

Answers

Answer:

5.35%

Step-by-step explanation:

3 month 5.25%

So 4 times a year

(1+5.25%/4)^4 = 1.0535

So effective rate is 5.35%

There are 4 boys and 4 girls. In how many ways they can sit in a row
(i) there is no restriction.
(ii) not all girls sit together.
(iii) no two girls sit together.

Answers

If there are 4 boys and 4 girls , then the number of ways in which

(i) there is no restriction is 40320 ways  ,

(ii) not all girls sit together is 37440 ways  ,

(iii) no two girls sit together is 2880 ways  .

the number of boys in the class is =  4 boys ;

the number of girls in the class is = 4 girls ;

Part(i) ,

we have to find number of ways in which they can sit in a row where there is no restriction .

there are total of 8 persons ,

So ,the number of ways in which 8 persons can be arranged without any restrictions is = 8! ways.

= 40320 ways

Part(ii) ,

we have to find number of ways in which they can sit in a row where not all girls sit together.

the cases where all gets sit together is written as :

= B₁ , B₂ , B₃ , B₄ , G ⇒ 5! ways ;

= B: G₁ , G₂ , G₃ , G₄ ⇒ 4! ways ;

the number of ways all girls are together is = 5! × 4! ;

So , the number of ways not all girls are together is = 8! - 5!×4!  ;

= 37440 ways

Part(iii) ,

we have to find number of ways in which they can sit in a row where no two girls sit together.

this case can be denoted as : G , B₁ , G , B₂ , G , B₃ , G , B₄ .

So , the boys can be arranged in 4! ways ;

and there will be 5 places for 4 girls , which can be arranged in ⁵P₄ ways ;

total number of ways is = 5!×4! =  2880 ways .

Learn more about Seating Arrangement here

https://brainly.com/question/1471127

#SPJ4

Evaluate the expression using the given value of the variable:[ z + (-1 (z - x)) ]; use [x = 4], and [z = 5] .

Answers

Answer:

[z+(-1( z-x))]

given,

z=5 X=4

[5+(-1(5-4))]

[5+(-1x(1))]

5+(-1)

5-1

4

Plug in 4 for all the x values and 5 for all the z values in the equation given:

[z+(-1(z-x))] = [5 + (-1 (5 - 4))]

Solve using PEMDAS rules
= [5 + (-1 (5 - 4))]
= [5 + (-1 (1))]
= [5 + (-1)]
= [5 - 1]
= 4

please help me with math i’ll give you brainlist

Answers

Answer:

1. Funnel cakes- 12

2. Oreos- 21

Step-by-step explanation:

1. x= 42/3.50

x=12

2. y= 42/2

y= 21

Will mark Brainliest!! The table shows the city bus schedule for certain bus lines. Both buses are at the bus stop right now. In how many minutes will both busses be at the bus stop again?

Table is A=25 minutes
Table is B=15 minutes

Answers

Answer:

  75 minutes

Step-by-step explanation:

You want to know when both buses will be at the stop again if bus A arrives every 25 minutes, and bus B arrives every 15 minutes.

Least common multiple

The number of minutes until both buses are at the stop again is the least common multiple (LCM) of their arrival times.

Factors of the times are ...

  25 = 5·5

  15 = 3·5

A common multiple must have all of these factors, so will have factors ...

  LCM = 3·5·5 = 75

After 75 minutes, both buses will be at the stop again.

__

Additional comment

You can see that 5 is a common factor of the two numbers. The LCM can also be found as the product of the two numbers, divided by their greatest common factor (GCF).

  LCM(a, b) = a·b/GCF(a, b)

  LCM(15, 25) = 15·25/5 = 75

<95141404393>

the owner of an automobile repair shop studied the waiting times for customers who arrive at the shop for an oil change. the following data with waiting times in minutes were collected over a one-month period. 9 11 3 12 11 4 3 3 4 24 13 22 5 18 6 9 12 23 15 2 (a) develop a frequency distribution using classes of 0-4, 5-9, 10-14, 15-19, and 20-24.

Answers

Classes           Frequency

0-4                7

5-9                5

10-14              2

15-19              4

20-24              1

The frequency of each class is determined by counting the number of waiting times that fall within each range. For example, the class 0-4 has a frequency of 7, meaning 7 customers waited between 0 to 4 minutes for their oil change.

The number of times a specific value appears in the data is its frequency (f). A variable's distribution is its frequency pattern, or the collection of all conceivable values and the frequencies corresponding to those values.

To know more about frequency here

https://brainly.com/question/5102661

#SPJ4

Solve the system of linear equations by substitution.
5x+2y=9
x+y=-3

Answers

Hope this will be helpful

a random sample of n people selected from a large population will be asked whether they have read a novel in the past year. let the random variable r represent the number of people from the sample who answer yes. the variance of random variable r is 6. assume the responses are independent of each other. if the proportion of people from the population who read a novel in the past year is 0.40, which of the following is the best interpretation of random variable r ?

Answers

If the proportion of people from the population who read a novel in the past year is 0.40, then a binomial variable with 25 independent trials is the best interpretation of random variable R. So the option 2 is correct.

If the proportion of people from the population who read a novel in the past year is 0.40, then we have define which of the following is the best interpretation of random variable R.

The variance of random variable R is 6.

The variance of binomial distribution is:

var = np(1-p)

n = number of trials

p = the probability

6 = n × 0.40 × (1-0.40)

6 = n × 0.40 × 0.60

6 = n × 0.24

Divide by 0.24 on both side, we get

n = 25

The number of binomial trails is 25.

To learn more about binomial distribution link is here

brainly.com/question/14565246

#SPJ4

The complete question is:

A random sample of n people selected from a large population will be asked whether they have read a novel in the past year. Let the random variable R represent the number of people from the sample who answer yes. The variance of random variable R is 6. Assume the responses are independent of each other. If the proportion of people from the population who read a novel in the past year is 0.40, which of the following is the best interpretation of random variable R ?

1. A binomial variable with 15 independent trials

2. A binomial variable with 25 independent trials

3. A variable that is not binomial with 25 independent trials

4. A binomial variable with 40 independent trials

5. A variable that is not binomial with 40 independent trials

Four friends shared the cost of a pizza dinner. They ordered 1 large pizza for $17.50, 4 sodas for $1.25 each, and 4 salads. Salads normally cost $1.75 but were on sale: "Buy one, get one free." If the friends split the total cost of dinner equally, what was each person's share?

Answers

Answer:

$6.50

Step-by-step explanation:

So writing out everything

1 Pizza = $17.50

1 soda = $1.25

1 salad = $1.75

Exception; Salad is buy 1 get 1 free, so only 2 salads were paid for

Now we multiple

1 Pizza * 17.50 = 17.50

4 soda * 1.25 = 5

2 salad * 1.75 = 3.50

Now we add

17.50 + 5 = 22.50 + 3.50 = $26.00

Now lastly, we divide by 4 since there are 4 friends

26/4 = 6.5

Giving us a answer of $6.50

The question is in the image below

Answers

Answer:

y=4/3x-3

Step-by-step explanation:

By using rise/run, you can see the slope in the equation, as it goes 4 units up and 3 units to the right.

For the y-intercept, you can see that the line intercepts (0,-3), which makes it the y-intercept.

Answer: y=-3+4/3x

Step-by-step explanation:

You get -3 because that is the point on the y axis

You get 4/3x from rise every additional point after
                               -------

                               run

4. Trevor's science class is studying the rainfall
on the first day of each month for one
year. Explain why studying the rainfall on
the first day of September, October, and
November is not a random sample.

Answers

The reason studying the rainfall on the first day of September, October, and  November is not a random sample is: These are three consecutive months.

What is random sample?

Random sample can be defined as the type of  sample in which some number of people  or group of people are choose from a large population when conducting a test.

The reason why studying the rainfall on the first day of September, October, and  November is not a random sample was because the September, October and November are  three consecutive months.

Based on this the sample should be spread out  to the entire year and should include more than three months.

Therefore these are three consecutive months.

Learn more about Random sample here:https://brainly.com/question/24466382

#SPJ1

Vectors: Find the vector from the point (-4,8,7) to the point (6,5,5).Enter the coordinates (_, _, _)Equations of lines: Consider the vector equation of the line through the two points listed above. For each equation listed below, answer T if the equation represents the line, and F if it does not. Here is the list of questions:1. (x,y,z) = (-4,8,7) + t (-10,+3,+2)2. (x,y,z) = (6,5,5) + t (10,-3,-2)3. (x,y,z) = (-4,8,7) + t (6,5,5)4. (x,y,z) = (-4,8,7) + t (10,-3,-2)5. (x,y,z) = (6,5,5) + t (-4,8,7)

Answers

The direction vector from the point (-4,8,7) to the point (6,5,5) is (10, -3, -2). The equations which represent the line are: 1. True 2. True 3. False 4. True 5. False.

The direction vector for the line that passes through the two points A (-4,8,7) and B (6,5,5), the position vector of point A is subtracted from the position vector of point B, hence:

v = AB = (6 –(-4), 5 – 8, 5 – 7) = (10, -3, -2)

The vector equation of the line is given by:

r = r0 + tv

where r0 is position vector, t is a scalar parameter, and v is position vector.

Considering the vector equation, the equation which represents the line are:

1. (x,y,z) = (-4,8,7) + t (-10,+3,+2); True

2. (x,y,z) = (6,5,5) + t (10,-3,-2); True

3. (x,y,z) = (-4,8,7) + t (6,5,5); False

4. (x,y,z) = (-4,8,7) + t (10,-3,-2); True

5. (x,y,z) = (6,5,5) + t (-4,8,7); False

Learn more about Position vector:

https://brainly.com/question/29300559

#SPJ4

jahdiel is waxing a hardwood floor that has an area of 4 3/8 square yards. He takes a break aftr waxing 8/9 of the total area of the floor. What is the area, in square yards,that jahdiel waxed? write your answer as a mixed fraction in simplest form.

Answers

The amount of hardwood floor that Jahidel waxed is 3 8/9 yards²

What is an Equation?

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the amount of hardwood floor that Jahidel waxed be A

Now , the equation will be

The total area of the hardwood floor is = 4 3/8 yards²

The total area of the hardwood floor is = 35/8 yards²

The amount of floor waxed by Jahidel A = ( 8/9 ) x total area of the hardwood floor

Substituting the values in the equation , we get

The amount of floor waxed by Jahidel A = ( 8/9 ) x ( 35/8 ) yards²

On simplifying the equation , we get

The amount of floor waxed by Jahidel A = ( 35/9 ) yards²

The amount of floor waxed by Jahidel A = 3 8/9 yards²

Hence , the amount of floor waxed is 3 8/9 yards²

To learn more about equations click :

https://brainly.com/question/19297665

#SPJ1

In each figure for what values of x and y is the figure a parallelogram

Answers

The values of x and y that makes the figure a parallelogram are x = 17 and y = 26

How determine what values of x and y makes the figure a parallelogram?

A parallelogram is a four-sided geometric shape that has opposite sides that are parallel to each other.

The opposite sides of a parallelogram have the same length, and the opposite angles are also equal. The opposite sides of a parallelogram are also known as the bases, and the other two sides are known as the legs.

Since the opposite sides of a parallelogram are equal in length, we can say:

3x + 6 = 4 - x

3x + x = 4 - 6

4x = -2

x = -2/4

x = -1/2 = -0.5

y + 2 = 2y - 3

2 + 3 = 2y - y

5 = y

y = 5

Likewise, the opposite angles of a parallelogram are equal, so we can say:

(4x - 12)° = (3x + 5)°

4x - 12 = 3x + 5

4x - 3x = 5 + 12

x = 17

(3y + 46)° = (5y - 6)°

3y + 46 = 5y - 6

46 + 6 = 5y - 3y

52 = 2y

2y = 52

y = 52/2

y = 26

Thus, x = 17 and y = 26 makes the figure a parallelogram

Learn more about parallelogram on:

brainly.com/question/24587399

#SPJ1

< Question 8 of 42
Macmillan Learning
>
Arrange the given numbers from largest to smallest.
Largest
0.51
7.6
10²
5.6
105
4.9
10-3
Smallest
Answer Bank

Answers

From the given numbers ,The order from largest to smallest is 105,100,7.6,5.6,4.9,0.51,0.001

What is Descending order?

Descending order can be defined in such a way that the order is from largest to smallest.

Given numbers are ,

0.51 , 7.6 , 10^2 , 5.6 , 105 , 4.9 , 10^-3

10^2 = 10*10 = 100 .

so a^m = a multiplied by m times .

a^-m = 1/ a^m.

10^-3 = 1/1000 = 0.001

So,

We have to write from largest to smallest

we get,

105,100,7.6,5.6,4.9,0.51,0.001

Hence, From the given numbers ,The order from largest to smallest is 105,100,7.6,5.6,4.9,0.51,0.001

To learn more about Descending order from the given link.

https://brainly.com/question/23938305

#SPJ1

suppose that 22 inches of wire cost 66 cents. how much will 38 inches of wire cost in cents?

Answers

Answer:

114 cents

Step-by-step explanation:

1. 66÷22=3 cents per inch

2. 3×38=114

3. 114 cents ($1.14) for 38 inches

Please help I don’t get how to answer this !!

Answers

The length of sides in congruent triangles are MN=30, MP=18, PN=30

How to find MN, MP, PN, PS?

QR=30, RS=30,  SQ=18

In the diagram two congruent triangles are given ΔPMN ≅ ΔQSR.

So by CPCTC (corresponding parts of congruent triangles are congruent)

In ΔPMN and ΔQSR

PN=QR=30 in.

PM=SQ=18 in.

MN=RS= 30 in.

PN=QR=30 then PN=30

PM=SQ =18 then PM=18

MN=RS =30 then MN=30

Congruent triangles are the triangles of which all the sides and all the angles are congruent.

If two triangles are said to be congruent then its all corresponding parts must be equal.

To learn more about Congruent triangles refers to;

brainly.com/question/4150029

#SPJ1

Select 2 fractions that are equivalent to 1

Answers

Step-by-step explanation:

2/2

23/23

749876/749876

...

you did not show us any fractions to select.

a fraction is always 1, when the value on the top is the same value as on the bottom.

15 cm
5 cm
4 cm
3 cm
Find the lateral surface area of the solid above.
Answer here

Answers

The answer for lateral surface area of the Triangular prism is 180 cm²

What is Lateral Surface Area?

Any solid object's lateral area can be calculated using the lateral area formula. Any figure's lateral area only includes the non-base faces. Calculating the lateral surface area of various forms, such as the cuboid, cube, cylinder, cone, and sphere, is made easier using lateral area formulas.

The lateral area for a triangular prism

A triangular prism's lateral area is equal to the sum of its side faces' areas (which are 3 rectangles). Specifically, it is the total surface area less the surface areas of the two bases. Additionally called the lateral surface area (LSA). Due to the two dimensions involved in its calculation, we measure it in square units.

The total of the three regions is the triangular prism's lateral area. Consequently, the triangular prism's lateral area formula is

Triangular prism lateral surface area (LSA) = ah + bh + ch (or) (a + b + c) h.

We are aware that the perimeter of the base is (a + b + c) (triangle). Hence,

Triangular prism's lateral surface area (LSA) is equal to the product of the base's perimeter and the prism's height.

base perimeter × height

Explanation

The Given Image of the solid is Matching to a prism.so we are calculating the lateral surface area of the prism

The dimensions of each base are:

a = 5cm

b = 4 cm

c = 3 cm

The height of the triangular prism = 15cm.

Thus, the lateral area of triangular prism = (a + b + c ) h

= (5 + 4 + 3) 15

= (12) 15

= 180 cm²

Answer: The lateral area of the given triangular prism = 180 cm²

To know more about  triangular prism visit :-

https://brainly.com/question/24046619

#SPJ1

Evaluate this expression using order of operations when x=1.5 7.5 - 2 ÷ (4x - 2)

Answers

7.5 - 2 / (4(1.5) -2) = 7.5-2/(4) = 7.5 -2 = 5.5

Find the inverse Laplace transforms of the following functions. First, perform partial-fraction expansion on G(s); then, use the Laplace transform table. (a). G(s)= 1 / s(s+2)(s+3) (b). G(s)= 10 / (s +1)^2(s+3) (c). G(s)= [100(s+2) / s(s^2 + 4)(s+1)] e^-x
(d). G(s)= 2(s+1) / s(s^2+s+2) (e). G(s)= 1 / (s+1)^3 (f). G(s)= 2(s^2+s+1) / s(s+1.5)(s^2 +5s+5)
(g). G(s)= [2+2se^(-x) + 4e^(-2x)] / [s^2 + 3s + 2] (h). G(s) = 2s+1 / (s^2 + 6s^2 +11s +6)
(i). G(s) = (3s^3 + 10s^2 + 8s + 5) / (s^4 + 5s^3 + 7s^2 + 5s +6)

Answers

The inverse Laplace transform of G(s) is 1 + 2e^(-2t) + 3e^(-3t).

(a). G(s)= 1 / s(s+2)(s+3)

Using partial fraction expansion, we can write G(s) as 1/s + 2/s+2 + 3/s+3. Then, using the Laplace transform table, we can find the inverse Laplace transform of each of these fractions. The inverse Laplace transform of 1/s is 1, the inverse Laplace transform of 2/s+2 is 2e^(-2t) and the inverse Laplace transform of 3/s+3 is 3e^(-3t). Therefore, the inverse Laplace transform of G(s) is 1 + 2e^(-2t) + 3e^(-3t).

(b). G(s)= 10 / (s +1)^2(s+3)

Using partial fraction expansion, we can write G(s) as 5/s+1 + 5/s+3. Then, using the Laplace transform table, we can find the inverse Laplace transform of each of these fractions. The inverse Laplace transform of 5/s+1 is 5e^(-t) and the inverse Laplace transform of 5/s+3 is 5e^(-3t). Therefore, the inverse Laplace transform of G(s) is 5e^(-t) + 5e^(-3t).

(c). G(s)= [100(s+2) / s(s^2 + 4)(s+1)] e^-x

Using partial fraction expansion, we can write G(s) as 50/s + 50/s+1 + 50/s+2 + 50/s+4. Then, using the Laplace transform table, we can find the inverse Laplace transform of each of these fractions. The inverse Laplace transform of 50/s is 50, the inverse Laplace transform of 50/s+1 is 50e^(-t), the inverse Laplace transform of 50/s+2 is 50e^(-2t) and the inverse Laplace transform of 50/s+4 is 50e^(-4t). Therefore, the inverse Laplace transform of G(s) is 50 + 50e^(-t) + 50e^(-2t) + 50e^(-4t)e^-x.

Learn more about  inverse Laplace transform here:

https://brainly.com/question/1675085

#SPJ4

FOR WHICH INEQUALITY IS Z = 3 A SOLUTION??/

Answers

The inequality is z = 3 a solution. The correct answer would be an option (C).

What is inequality?

Inequality is defined as mathematical statements that have a minimum of two terms containing variables or numbers that are not equal.

As per option (A), the inequality is given as follows:

z+5 ≥ 9

z ≥ 9 - 5

z ≥ 4

As per option (B), the inequality is given as follows:

z+5 > 9

z > 9 - 5

Apply the subtraction operation,

z > 4

As per option (C), the inequality is given as follows:

z + 5 ≤ 8

z ≤ 8 - 5

z ≤ 3

Since the solution is less than or equal to three,

Then, this inequality is z = 3 a solution.

Hence, the correct answer would be option (C).

Learn more about the inequalities here:

brainly.com/question/20383699

#SPJ1

This question seems incomplete, the complete question would be as:

For which inequality below is z = 3 a solution?

A. z+5 ≥ 9

B. z+5 > 9

C. z+5 ≤ 8

D. z+5 <8

solve this system of equations by using the elimination method.
2x+y=4 x+3y=2

Answers

Answer:x=1 y=5

Step-by-step explanation:

the distribution of the time it takes for different people to solve a certain suduko puzzle is strongly skewed to the right, with a mean of 30 minutes and std of 15 minutes. the distribution of z-scores for those times is:

Answers

The distribution of z-scores would be a normal distribution centered at 0, with a standard deviation of 1.

The distribution of time it takes for people to solve a certain Sudoku puzzle is strongly skewed to the right. This means that most people take a shorter amount of time to solve the puzzle, but some take a longer amount of time. The mean (average) of this distribution is 30 minutes and the standard deviation is 15 minutes.

To find the distribution of z-scores, we need to convert the times into z-scores, which is done by subtracting the mean (30) from each time and then dividing by the standard deviation (15). This gives us a new distribution of z-scores, which is centered at 0 (since the mean of the times was subtracted from each time) and has a standard deviation of 1.

Learn more about standard deviation here:

https://brainly.com/question/23907081

#SPJ4

A set of electric toothbrush prices are normally distributed with a mean of 87 dollars and a standard deviation of 8 dollars.
What proportion of electric toothbrush prices are between 104.60 dollars and 108.20 dollars?

Answers

The proportion of electric toothbrush prices are between 104.60 dollars and 108.20 dollars are 0.0099.

What is Normal Distribution?

A normal distribution in statistics is defined as the type of continuous probability distribution where the datas are arranged in a symmetrical bell shaped graph.

Given that,

Mean, μ = 87

Standard deviation, σ = 8

We have to calculate P (104.60 < x < 108.20).

For that find z score.

z = (x - μ) / σ

At x = 104.60, z = (104.60 - 87) / 8 = 2.2

At x = 108.20, z = (108.20 - 87) / 8 = 2.65

From the z table,

P(z < 2.65) = 0.9960 and P(z < 2.2) = 0.9861

P (104.60 < x < 108.20) = 0.9960 - 0.9861 = 0.0099

Hence the proportion is 0.0099.

Learn more about Normal Distribution here :

https://brainly.com/question/29509087

#SPJ1

State if the two triangles are congruent. If they are, state how you know.
Correct the right choice
HL
LL
AAS
cannot be determined

Answers

According to the figure the two triangles congruency state cannot be determined

D. cannot be determined

What does triangular congruency mean?

Triangles are considered congruent when their sides and angles match those specified by the triangle congruency rules.

The triangle congruency rules.

Side - Side - Side = SSS.

Angle - Side - Side = SAS

Side - Angle - Angle = ASA

Angle, Angle, and Side = AAS

Hypotenuse plus one leg = HL

To demonstrate that the triangles are congruent, the is need for three parameters to be known except for right triangle

In the problem, only two parameters can be deduced the side and the angle equal by vertical angle theorem

Learn more about angles:

brainly.com/question/29393764

#SPJ1

problem solving you go on a hayride to take photographs of landmarks. the map shows your path and two landmarks. each unit in the coordinate plane corresponds to 10 yards. approximate your minimum distance from the giant pumpkin. if necessary, round your answer to the nearest tenth.

Answers

The minimum distance from the giant pumpkin is 8.9 yards.

We will use the minimum distance formula between a line and a point to obtain the distance in this case.

A linear function is given according to the standard notation  by:

Ax+By+C=0

A point with 'x' and 'y' coordinates are given by:

P(x*,y*)

The formula to find the shortest distance between a point and a line is denoted by the formula:

d=|Ax*+By*+C|/√(A²+B²)

In this issue, the path's line includes:

When x = 0, and y = 0, the intercept is 0.

0.5 slope means that when x rises by 4, y rises by 2.

Thus, y=1/2x

-1/2x+y=0

or, -x+2y=0

The coefficients of the line are:

A=-1 and B=2

Coordinates of the giant pumpkin is (x*,y*)=(-4,-3)

Therefore, the minimum distance is:

d=|(-1)(-4)+2(-3)|/√5

or,d=2/√5

or, d=0.89 units

We know, 1 unit=10 yards

or, 0.89 units=8.9 yards

Thus, the minimum distance between a point and a line is 8.9 yards.

to know more about point and line, visit brainly.com/question/7158994

#SPJ4

Evaluate 0.3 y+\dfrac yz0.3y+
z
y

0, point, 3, y, plus, start fraction, y, divided by, z, end fraction when y=10y=10y, equals, 10 and z=5z=5z, equals, 5.

Answers

The value of the expression when y = 10 and z = 5 is 5

How to evaluate the expression

From the question, we have the following parameters that can be used in our computation:

0.3y + y/z

Also, from the question, we have the following values:

y = 10 and z = 5

substitute the known values in the above equation, so, we have the following representation

0.3y + y/z = 0.3 * 10 + 10/5

Evaluate the expression

0.3y + y/z = 5

Hence, the solution is 5

Read more about expression at

https://brainly.com/question/4344214

#SPJ1

Other Questions
question 3 when conducting a usability study, the researchers decide to record their findings in a debriefing meeting after the session. is this the best way to collect their observations? after sunlight systems merged with lumen enterprises, company executives noticed that due to increased employee collaboration between the two units, costs were down and revenues increased within both areas. this is an example of which of the following? A 4000 kg truck traveling at 10 m/s collides with a 1000 kg car that is at rest. Answer the following questions concerning the collision. (Circle all that apply. Consider only the magnitude of the values, ignore the fact that some are negative numbers. ) A) Which experiences a larger force? truck or car or neither B) Which experiences a larger impulse? truck or car or neither C) Which experiences a larger change in momentum? truck or car or neither D) Which experiences a larger change in velocity? truck or car or neither I will mark brainliest if correct! Please! according to plate tectonics, oceanic crust forms from upwelling magma that spreads outward from a mid-ocean ridge. what of the statements support this? NO LINKS!!!!Please help me with #4 If triangle NPQ is congruent to triangle RSQ the perimeter of triangle NPQ= 7x+2, and the perimeter of triangle RSQ=10x-4, find the perimeter of triangle NPQ the cover charge for entering mandi's dance hall is $5. drinks are then $6 each. what equation, in point-slope form, will give the total cost for the cover charge and drinks? i forget joint frequency Early in its history, psychology was divided into two branches, each with a distinct focus. What were those two branches?1. ethical and unethical2. clinical and historical3. clinical and scientific4. behavioral and scientific How is a republic similar to a direct democracy ? 3. Where did the themes in Seneca's dramatic plays come from?A. Greek mythsB. his time on CorsicaC. Roman satiresD. the writing of Stoics Ani bought a bag to hold her dive weights. the bags manufacturer claims that it can hold 53 pounds without breaking. ani has placed 29 pounds in the bag. how many more pounds can she place in the bag before it breaks? What is the inequality to represent the situation. Solve the inequality and graph your solution. sam walks at a constant speed of 5.00m/s along a straight ling from point a to point b. they then walk back along the line from point b to point a at a constant speed of 3.00m/s. what is the velocity speed over the entire trip. Which sentence uses the word lapse correctly?A) I am going to run lapse around the track.B) After her head injury, LaLa began noticing a memory lapse.C) I forgot my books, what a lapse! determine whether each of the amino acids is polar neutral, hydrophobic, positively charged, or negatively charged. g List three research questions related to interagency cooperation and thecommunication tools and codes used by law enforcement. What professional organization or group could you e-mail for assistance in answering these questions? What steps can you take to make sure your e-mail is professional sounding? Please answer the question... a client with an inflamed sciatic nerve is to have a conventional transcutaneous electrical nerve stimulation (tens) device applied to the painful nerve pathway. when operating the tens unit, which nursing action is appropriate? solve for x x+19 7x+9 Help me ASAP math question.