Question

1. A sleep researcher believes that people deprived of sleep for 24 hours will perform worse on a short-term memory test than a group not deprived of sleep. She randomly assigns some volunteers to the sleep deprivation group and others to the control group and intends to compare their scores on the short-term memory test. Parametric Test: repeated-measures t-test independent-measures t test Nonparametric Test: Kruskal-Wallis test repeated-measures t-test Mann-Whitney U-test 2. An educational psychologist believes using flash cards to memorize math facts does not improve students' math scores. She gives a random sample of second graders a math test and then has each student memorize math facts with flash cards for a week. She repeats the math test 1 month later and compares the scores. Parametric Test: Nonparametric Test:

Answer 1

1 ) parametric test: independent measure t test

non parametric test: Mann Whitney U test

2)

parametric test: repeated measure t test

non parametric test: Wilcoxon signed rank test

3)

parametric test:  independent measure ANOVA
non parametric test: Kruskal Wallis

4)

parametric test:  repeated measure or within group ANOVA
non parametric test: Friedman test