Duplicate of Statistical Inference Methods

Question 1

Do foreign-made cars have better gas mileage than American-made cars?

Accepted Answer

2 sample t test

Question 2

Do people spend more time working or sleeping?

Accepted Answer

Paired t test

Question 3

How much greater is the average cholesterol of egg eaters vs. egg abstainers?

Accepted Answer

2-sample t interval

Question 4

Do smokers and nonsmokers differ in opinion on health care reform?

Accepted Answer

2 sample z test

Question 5

How many fewer calories do vegetarians consume compared to meat eaters?

Accepted Answer

2-sample t interval

Question 6

Are literature majors more likely to go to a movie theater then science majors?

Accepted Answer

2-sample z test

Question 7

Are tourists on the North Shore more likely to rent a boat than tourists on the South Shore?

Accepted Answer

2-sample z test

Question 8

Observe police records from 200 consecutive days. Are more crimes committed during day/ night?

Accepted Answer

Paired t test

Question 9

Does the new machine for filling jars with jelly work better than the previous model?

Accepted Answer

2-sample t test

Question 10

How much longer will a group of swimmers stay in heated pool than a group in an unheated pool?

Accepted Answer

2-sample t interval

Question 11

How much higher is the high school graduation rate in Illinois than in California?

Accepted Answer

2-sample z interval

Question 12

Is the first-born puppy larger than the last-born puppy? 450 litters were investigated.

Accepted Answer

Paired t test

Question 13

How much faster is the average service time at fast food restaurant vs. sit down restaurants?

Accepted Answer

2-sample t interval

Question 14

Is an SAT prep class effective in increasing test scores?

Accepted Answer

Paired t test

Question 15

How much more productive are employees when there is music playing?

Accepted Answer

Paired t interval

Questions 15