Deck 8: Analyzing Data: Comparing Means

Question 1

For each of the following hypotheses, decide which statistic should be used:
-There is no difference in yearly salary among four regions of the country (east, west, south, and north). _________

Answer 1

ANOVA or F test

Question 2

For each of the following hypotheses, decide which statistic should be used:
-There is a difference in scores on a satisfaction scale between salaried and hourly employees. _________

Answer 2

t-test

Question 3

For each of the following hypotheses, decide which statistic should be used:
-There is no relationship between mean number of children and religion practiced. __________

Answer 3

ANOVA

Question 4

A survey about classical musical tastes measures liking or disliking using a 10 point scale where a 10 = likes very much. Here are the findings:
College graduates mean = 5.7
Non college-grads mean = 4.1
t value = 12.2, p < .001
-Why is a t-test being used here?

Question 5

A survey about classical musical tastes measures liking or disliking using a 10 point scale where a 10 = likes very much. Here are the findings:
College graduates mean = 5.7
Non college-grads mean = 4.1
t value = 12.2, p < .001
-Interpret what you are finding for fellow statistical experts.

Question 6

A survey about classical musical tastes measures liking or disliking using a 10 point scale where a 10 = likes very much. Here are the findings:
College graduates mean = 5.7
Non college-grads mean = 4.1
t value = 12.2, p < .001
-What do you tell the general public you have discovered?

Question 7

When comparing the scores on a satisfaction scale for a group of workers before and after new salaries were provided, it is best to test the difference in mean satisfaction scores using

A) an independent samples t-test
B) analysis of variance
C) paired samples t-test
D) one-sample t-test

Question 8

Explain "confidence interval."

Question 9

What statistics would be most useful to test whether you reject or accept the null hypothesis?
-there is no difference in spending habits (money spent) between teenage boys and teenage girls _______

Question 10

What statistics would be most useful to test whether you reject or accept the null hypothesis?
-there is no relationship between political party membership (Democrat, Republican, etc.) and residence location (rural, suburban, urban). _____

Question 11

What statistics would be most useful to test whether you reject or accept the null hypothesis?
-there is no relationship between level of job satisfaction (very satisfied to very unsatisfied) and educational level (high school, college, graduate/professional) _______

Question 12

What statistics would be most useful to test whether you reject or accept the null hypothesis?
-subjects are asked their height and then actually measured: there is no difference in self-reported height and measured height. ________

Question 13

What statistics would be most useful to test whether you reject or accept the null hypothesis?
-there is no relationship between age and anomie (scored on a scale with items from an anomie scale) ________

Question 14

What statistics would be most useful to test whether you reject or accept the null hypothesis?
-there is no difference in SAT scores among students in different majors ________