You have carried out a Kruskal–Wallis test. There are significant differences between the three groups you are testing. How might you conduct your pairwise comparisons?
A. None of these. Post hoc analyses cannot be carried out using non-parametric tests.
B. Perform Mann–Whitney tests
C. Perform Wilcoxon rank-sum tests
D. Perform t-tests.
Answer: B
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When studying, student-athletes may be distracted by which of the following?
a. Physical fatigue and the internet b. All of these choices c. Internet d. Teammates e. Physical fatigue
In which decade did the movement for public school choice emerge?
a. 1950s b. 1980s c. 1990s d. 2010s
The instrument most likely to minimize the social desirability bias in a survey of the parents of a large school district
a. personal interview c. mailed questionnaire b. telephone interview d. directly administered questionnaire
A sample of 500 voters was surveyed; 400 said they favored a bond issue and 100 said they opposed it. Based on these sample data, estimate at the 95 percent confidence level the proportion in the population that likely favors the bond issue
a. .77 to .83 c. .79 to .81 b. .78 to .82 d. .75 to .85