Math Answers

Of the 20 people attending a lecture, 2 have brown eyes. What is the probability that a randomly selected person will have brown eyes?

The following data show the number of cars sold at a dealer during the past 20 weeks:

18; 13; 2; 20; 8; 10; 5; 10; 6; 9; 10; 20; 2; 15; 16; 16; 13; 10; 17; 10

Use the data to construct a histogram that shows the number of weeks versus car sales. Use the intervals

0,5 − 4,5; 4,5 − 8,5; 8,5 − 12,5; 12,5 − 16,5; 16,5 − 20,5

for the number of cars sold. The correct histogram

Given the population 3, 5, 8, 9, and 10. Suppose samples of size 4 are drawn from this population

1. What is the mean (u) and standard deviation (a) of the population?

2. How many different samples of size n& can be drawn from the population? List them

corresponding means. 3. Construct the sampling distribution of the sample means

4 What is the mean () of the sampling distribution of the sample means? Compare this to the mean

the population

5. What is the standard deviation (n) of the sampling distribution of the sample means? Compare thin

the standard deviation of the population.

Given the population 3, 5, 8, 9, and 10. Suppose samples of size 4 are drawn from this population

1. What is the mean (u) and standard deviation (a) of the population?

2. How many different samples of size n& can be drawn from the population? List them

corresponding means. 3. Construct the sampling distribution of the sample means

4 What is the mean () of the sampling distribution of the sample means? Compare this to the mean

the population

5. What is the standard deviation (n) of the sampling distribution of the sample means? Compare thin

the standard deviation of the population.

The following data show the number of cars sold at a dealer during the past 20 weeks:

18; 13; 2; 20; 8; 10; 5; 10; 6; 9; 10; 20; 2; 15; 16; 16; 13; 10; 17; 10

Use the data to construct a histogram that shows the number of weeks versus car sales. Use the intervals

0,5 − 4,5; 4,5 − 8,5; 8,5 − 12,5; 12,5 − 16,5; 16,5 − 20,5

for the number of cars sold. The correct histogram

Given the population 3, 5, 8, 9, and 10. Suppose samples of size 4 are drawn from this population

1. What is the mean (u) and standard deviation (a) of the population?

2. How many different samples of size n& can be drawn from the population? List them

corresponding means. 3. Construct the sampling distribution of the sample means

4 What is the mean () of the sampling distribution of the sample means? Compare this to the mean

the population

5. What is the standard deviation (n) of the sampling distribution of the sample means? Compare thin

the standard deviation of the population.

1-5=

For each population, find the mean of the sampling distribution of the sample mean with an indicating sample size,n.

A.7,10,19,20 ; n=2

B.46,51,55,59,61 ; n=3

C.24,26,29,32,35 ; n=4

the following are the height of 8 students in centimeters suppose sampe of size 3 are taken from this population of 8 students.

student height

a 120

b 130

c 110

d 125

e 152

f 170

g 137

h 155

a) how many sample are possible? list them and cmpute the mean of each example?

b) construct the sampling distribution of the sample means

c) construct the histogram of the sampling distribution of the sample means

The number of samples of size r that can be drawn from a population of size n is given by a representation?