You are evaluating two groups, with 50 people per group and formed with random assignment,
to see if listening to music when learning a list of words improves later recall of the words.
Because you will then rank the participants according to the number of recalled words, and you
know the groups are not normally distributed, which of the following tests is most appropriate
to determine group differences?
A) Mann-Whitney U Test
B) rank sums test
C) Wilcoxon T Test
D) chi-square test for two levels of a single nominal variable
E) Kruskal-Wallis H Test
Question 2
Which design is represented by the diagram below?
O1 O2 O3 O4 X O5 O6 O7 O8
O1 O2 O3 O4 O5 O6 O7 O8
A) multiple-observation design
B) interrupted time-series design with control group
C) pretest-posttest control-group design
D) interrupted time-series design
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