Deck 11: Inference on Two Samples

Question 1

Test Hypotheses Regarding Matched-Pairs Data

Answer 1

A

Question 2

Test Hypotheses Regarding Matched-Pairs Data

Answer 2

Question 3

Test Hypotheses Regarding Matched-Pairs Data
When performing a hypothesis test upon two dependent samples, the variable of interest is

A) the differences that exist between the matched-pair data.
B) all of the combined data.
C) the absolute value of the differences that exist between the matched-pair data.
D) the data that is the same in both samples.

Answer 3

A

Question 4

Test Hypotheses Regarding Matched-Pairs Data

Question 5

Test Hypotheses Regarding Matched-Pairs Data
Robustness in hypothesis testing means

A) departures from normality do not adversely affect the results.
B) there are no departures from normality.
C) the data is effected by outliers.
D) all processes can be exactly duplicated by selecting another pair of samples.

Question 6

Classify the two given samples as independent or dependent. Sample 1: The scores of 23 students who took a statistics final Sample 2: The scores of 23 different students who took a physics final

A) independent
B) dependent

Question 7

Construct and Interpret Confidence Intervals about the Population Mean Difference of Matched -Pairs Data

Question 8

Test Hypotheses Regarding Matched-Pairs Data

Question 9

Test Hypotheses Regarding Matched-Pairs Data

Question 10

Classify the two given samples as independent or dependent. Sample 1: The heights in inches of 19 newborn females Sample 2: The heights in inches of 19 newborn males

A) independent
B) dependent

Question 11

Test Hypotheses Regarding Matched-Pairs Data

Question 12

Test Hypotheses Regarding Matched-Pairs Data

Question 13

Question 14

If the individuals selected for a sample have no influence upon which individuals are selected for a second sample, then the samples are said to be

A) independent
B) dependent
C) inconsistent
D) consistent

Question 15

Test Hypotheses Regarding Matched-Pairs Data

Question 16

Test Hypotheses Regarding Matched-Pairs Data

Question 17

Test Hypotheses Regarding Matched-Pairs Data

Question 18

Test Hypotheses Regarding Matched-Pairs Data

Question 19

Two samples are said to be dependent if

A) the individuals in one sample are used to determine the individuals in a second sample.
B) the individuals in one sample have no influence over the selection of the individuals in a second sample.
C) some individuals, but not all, in one sample exert influence over who is selected for inclusion in a second
D) sampling for inclusion in the two samples is done with replacement.

Question 20

Test Hypotheses Regarding Matched-Pairs Data

Question 21

Construct and Interpret Confidence Intervals about the Population Mean Difference of Matched -Pairs Data

Question 22

Test Hypotheses Regarding the Difference of Two Independent Means

Question 23

Test Hypotheses Regarding the Difference of Two Independent Means

Question 24

Construct and Interpret Confidence Intervals about the Population Mean Difference of Matched -Pairs Data

Question 25

Construct and Interpret Confidence Intervals about the Population Mean Difference of Matched -Pairs Data

Question 26

Test Hypotheses Regarding the Difference of Two Independent Means

Question 27

Test Hypotheses Regarding the Difference of Two Independent Means

Question 28

Test Hypotheses Regarding the Difference of Two Independent Means

Question 29

Test Hypotheses Regarding the Difference of Two Independent Means

Question 30

Test Hypotheses Regarding the Difference of Two Independent Means

Question 31

Test Hypotheses Regarding the Difference of Two Independent Means

Question 32

Test Hypotheses Regarding the Difference of Two Independent Means

Question 33

Test Hypotheses Regarding the Difference of Two Independent Means

Question 34

Test Hypotheses Regarding the Difference of Two Independent Means
A study was conducted to determine if the salaries of librarians from two neighboring cities were equal. A sample of 15 librarians from each city was randomly selected. The mean from the first city was $28,900 with a standard deviation of $2300. The mean from the second city was $30,300 with a standard deviation of $2100. Test the hypothesis that the salaries from both cities are equal.

Question 35

Test Hypotheses Regarding the Difference of Two Independent Means

Question 36

Test Hypotheses Regarding the Difference of Two Independent Means

Question 37

Construct and Interpret Confidence Intervals about the Population Mean Difference of Matched -Pairs Data

Question 38

Test Hypotheses Regarding the Difference of Two Independent Means

Question 39

Construct and Interpret Confidence Intervals about the Population Mean Difference of Matched -Pairs Data

Question 40

Construct and Interpret Confidence Intervals about the Population Mean Difference of Matched -Pairs Data

Question 41

Construct and Interpret Confidence Intervals Regarding the Difference of Two Independent Means

Question 42

Test Hypotheses Regarding the Difference of Two Independent Means

Question 43

Test Hypotheses Regarding the Difference of Two Independent Means

Question 44

Test Hypotheses Regarding the Difference of Two Independent Means
At a local store, 65 female employees were randomly selected and it was found that their mean monthly income was $617 with a standard deviation of $121.50. Seventy-five male employees were also randomly selected and their mean monthly income was found to be $659 with a standard deviation of $168.70. Test the hypothesis that male employees have a higher monthly income than female employees. Use = 0.01.

Question 45

Test Hypotheses Regarding the Difference of Two Independent Means

Question 46

Test Hypotheses Regarding the Difference of Two Independent Means

Question 47

Test Hypotheses Regarding the Difference of Two Independent Means

Question 48

Test Hypotheses Regarding the Difference of Two Independent Means
A study was conducted to determine if the salaries of librarians from two neighboring states were equal. A sample of 100 librarians from each state was randomly selected. The mean from the first state was $29,300 with a standard deviation of $2300. The mean from the second state was $30,700 with a standard deviation of $2100. Test the hypothesis that the salaries from both states are equal. Use = 0.05.

Question 49

Construct and Interpret Confidence Intervals Regarding the Difference of Two Independent Means

Question 50

Test Hypotheses Regarding the Difference of Two Independent Means

Question 51

Construct and Interpret Confidence Intervals Regarding the Difference of Two Independent Means

Question 52

Test Hypotheses Regarding the Difference of Two Independent Means

Question 53

Test Hypotheses Regarding the Difference of Two Independent Means

Question 54

Test Hypotheses Regarding the Difference of Two Independent Means

Question 55

Test Hypotheses Regarding the Difference of Two Independent Means

Question 56

Test Hypotheses Regarding the Difference of Two Independent Means

Question 57

Test Hypotheses Regarding the Difference of Two Independent Means

Question 58

Test Hypotheses Regarding the Difference of Two Independent Means

Question 59

Construct and Interpret Confidence Intervals Regarding the Difference of Two Independent Means

Question 60

Construct and Interpret Confidence Intervals Regarding the Difference of Two Independent Means

Question 61

Provide an appropriate response.

Question 62

Provide an appropriate response.

Question 63

Provide an appropriate response.

Question 64

Construct and Interpret Confidence Intervals for the Difference between Two Population Proportions

Question 65

Provide an appropriate response.

Question 66

Provide an appropriate response.

Question 67

Provide an appropriate response.

Question 68

Provide an appropriate response.

Question 69

Provide an appropriate response.

Question 70

Provide an appropriate response.

Question 71

Provide an appropriate response.

Question 72

Construct and Interpret Confidence Intervals for the Difference between Two Population Proportions

Question 73

Provide an appropriate response.

Question 74

Provide an appropriate response.

Question 75

Provide an appropriate response.

Question 76

Construct and Interpret Confidence Intervals Regarding the Difference of Two Independent Means

Question 77

Construct and Interpret Confidence Intervals Regarding the Difference of Two Independent Means

Question 78

Provide an appropriate response.

Question 79

Construct and Interpret Confidence Intervals Regarding the Difference of Two Independent Means
A recent study of 100 social workers in a southern state found that their mean salary was $23,000 with a standard deviation of $2100. A similar study of 100 social workers in a western state found that their mean salary was $33,400 with a standard deviation of $3200. Test the claim that the salaries of social workers in the western state is more than $10,000 greater than that of social workers in the southern state. Use = 0.05.

Question 80

Provide an appropriate response.