Question

A sports psychologist is interested in the influence, if any, of pressure on the accuracy of free throw shooting in basketball. For 12 players he records the percentage of free throws made when pressure is high (i.e., at the end of close games). For the same 12 players he also records the percentage of free throws made when pressure is low (i.e., at the end of blowouts). The data below are the percentages for each player in both situations Using these data decide whether it is generally true that pressure influences free throw shooting.

Free Throw Percentages under:

        pressure       no pressure

             65                 67

             57                 63

             82                 85

             85                 82

             72                 72

             68                 71

             84                 83

             65                 68

             58                 59

             72                 78

             76                 77

             68                 71

a) what is the appropriate inferential statistic? (choose one)

•Two-independent-samples t test

•Related-samples t test

•One-way between-subjects ANOVA

•One-way repeated-measures (within-subjects) ANOVA

•Two-way between-subjects ANOVA

•Regression/correlation

•Chi-square test for independence

b) The critical value(s) are?

Answer 1

a.

Chi square test for independence.

b.

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