# Problems dealing with Confidence Interval Estimation and Hypothesis Testing

*label*Mathematics

*timer*Asked: Oct 22nd, 2018

*account_balance_wallet*$9.99

### Question Description

There are actually 9 problems broken down to individual components to identify key steps required to solve the problem. They appear as multiple chioce questions. For example the 1st 8 questions are dealing with one problem. |

1.8 points

### QUESTION 2

1.8 points

### QUESTION 3

1.8 points

### QUESTION 4

1.9 points

### QUESTION 5

1.9 points

### QUESTION 6

1.9 points

### QUESTION 7

1.9 points

### QUESTION 8

1 points

### QUESTION 9

1.8 points

### QUESTION 10

1.9 points

### QUESTION 11

1.9 points

### QUESTION 12

1.9 points

### QUESTION 13

1.9 points

### QUESTION 14

1.9 points

### QUESTION 15

1 points

### QUESTION 16

1.9 points

### QUESTION 17

1.9 points

### QUESTION 18

1.9 points

### QUESTION 19

1.9 points

### QUESTION 20

1.9 points

### QUESTION 21

1.9 points

### QUESTION 22

1.9 points

### QUESTION 23

1.9 points

### QUESTION 24

1.9 points

### QUESTION 25

1.9 points

### QUESTION 26

1.9 points

### QUESTION 27

1.9 points

### QUESTION 28

1.9 points

### QUESTION 29

1.9 points

### QUESTION 30

1.9 points

### QUESTION 31

1.9 points

### QUESTION 32

1.9 points

### QUESTION 33

1.9 points

### QUESTION 34

1.9 points

### QUESTION 35

1.9 points

### QUESTION 36

1.5 points

### QUESTION 37

1.9 points

### QUESTION 38

1.9 points

### QUESTION 39

1.9 points

### QUESTION 40

1.9 points

### QUESTION 41

1.9 points

### QUESTION 42

1.9 points

### QUESTION 43

1.9 points

### QUESTION 44

1.9 points

### QUESTION 45

1.9 points

### QUESTION 46

1.9 points

### QUESTION 47

1.9 points

### QUESTION 48

1.9 points

### QUESTION 49

1.9 points

### QUESTION 50

1.9 points

### QUESTION 51

1.9 points

### QUESTION 52

1.9 points

### QUESTION 53

1.9 points

### QUESTION 54

## Tutor Answer

The solution is attached.Please, give me feedback.

QUESTION 1

.

The labor relations manager of a large corporation wished to study the absenteeism

among workers at the company's central office during the last year. A random sample

of 25 workers revealed the following: an average of 9.7 days; a standard deviation of

4.0 days; and 12 employees were absent more than 10 days. In estimating a 95%

confidence interval estimate of the average number of days absent for the company's

workers last year what will be the standard error?

.

4.0

.16

.80

.025

.

1.8 points

QUESTION 2

.

The labor relations manager of a large corporation wished to study the absenteeism

among workers at the company's central office during the last year. a random sample

of 25 workers revealed the following: an average of 9.7 days; a standard deviation of

4.0 days; and 12 employees were absent more than 10 days. In estimating a 95%

confidence interval estimate of the average number of days absent for the company's

workers last year should you use a z or t value in the formula?

.

z

t

.

1.8 points

QUESTION 3

.

The labor relations manager of a large corporation wished to study the absenteeism

among workers at the company's central office during the last year. a random sample

of 25 workers revealed the following: an average of 9.7 days; a standard deviation of

4.0 days; and 12 employees were absent more than 10 days. In estimating a 95%

confidence interval estimate of the average number of days absent for the company's

workers last year what would be the value of your UPPER limit?

.

17.96

10.03

11.35

8.049

.

1.8 points

QUESTION 4

.

The labor relations manager of a large corporation wished to study the absenteeism

among workers at the company's central office during the last year. a random sample

of 25 workers revealed the following: an average of 9.7 days; a standard deviation of

4.0 days; and 12 employees were absent more than 10 days. In estimating the 95%

confidence interval estimate of the proportion of workers absent more than 10 days

last year what is the sample proportion used in the formula?

.

.12

.10

.48

040

.

1.9 points

QUESTION 5

.

The labor relations manager of a large corporation wished to study the absenteeism

among workers at the company's central office during the last year. a random sample

of 25 workers revealed the following: an average of 9.7 days; a standard deviation of

4.0 days; and 12 employees were absent more than 10 days. In estimating the 95%

confidence interval estimate of the proportion of workers absent more than 10 days

last year would you use a z or t in the formula?

.

z

t

.

1.9 points

QUESTION 6

.

The labor relations manager of a large corporation wished to study the absenteeism

among workers at the company's central office during the last year. a random sample

of 25 workers revealed the following: an average of 9.7 days; a standard deviation of

4.0 days; and 12 employees were absent more than 10 days. In estimating the 95%

confidence interval estimate of the proportion of workers absent more than 10 days

last year what is the value of the Z used in the formula?

.

1.708

1.711

1.65

1.96

1.9 points

QUESTION 7

The labor relations manager of a large corporation wished to study the absenteeism

among workers at the company's central office during the last year. a random sample

of 25 workers revealed the following: an average of 9.7 days; a standard deviation of

4.0 days; and 12 employees were absent more than 10 days. In estimating the 95%

confidence interval estimate of the proportion of workers absent more than 10 days

last year what is the upper limit of the confidence interval?

.

.516

.6445

.284

.676

.

1.9 points

QUESTION 8

.

You are considering investing in a company. The company claims for the past few

years the average monthly return on such an investment has been $870 with a

standard deviation of $50. You sample 30 investors and determine the sample average

return to be $855. Using a .05 level of significance you will test to determine if there

is evidence that the true average return is different from $870. Is this a 1 or 2 tail test?

.

1 tail

2 tail

indeterminate

none of the above

1 points

QUESTION 9

.

You are considering investing in a company. The company claims for the past few

years the average monthly return on such an investment has been $870 with a

standard deviation of $50. You sample 30 investors and determine the sample average

return to be $855. Using a .05 level of significance you will test to determine if there

is evidence that the true average return is different from $870. What are your critical

values?

.

+- 1.65

+- 2.045

+-1.96

+-1.65

.

1.8 points

QUESTION 10

.

You are considering investing in a company. The company claims for the past few

years the average monthly return on such an investment has been $870 with a

standard deviation of $50. You sample 30 investors and determine the sample average

return to be $855. Using a .05 level of significance you will test to determine if there

is evidence that the true average return is different from $870. What is the value of

your test statistic?

.

.30

-.30

8.98

-1.64

.

1.9 points

QUESTION 11

.

You are considering investing in a company. The company claims for the past few

years the average monthly return on such an investment has been $870 with a

standard deviation of $50. You sample 30 investors and determine the sample average

return to be $855. Using a .05 level of significance you will test to determine if there

is evidence that the true average return is different from $870. If your test statistic is

-1.64 what will be your decision?

.

Reject Ho

Reject H1

Do not reject H1

Do not reject Ho

.

1.9 points

QUESTION 12

.

You are considering investing in a company. The company claims for the past few

years the average monthly return on such an investment has been $870 with a

standard deviation of $50. You sample 30 investors and determine the sample average

return to be $855. Using a .05 level of significance you will test to determine if there

is evidence that the true average return is different from $870. What is your

conclusion?

.

There is evidence of a difference in the average return.

There is no evidence of a difference in the average return

Indeterminate

Inconclusive

1.9 points

QUESTION 13

A random sample of 400 college students was selected and 120 of them had at least

one motor vehicle accident in the previous two years. A random sample of 600 young

adults not enrolled in college was selected and 150 of them had at least one motor

vehicle accident in the previous two years. At t...

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