Answers to Test Yourself

Below are answers to the chapter Test Yourself feature.

(1) c (2) a (3) d (4) b (5) b (6) a (7) a (8a) The population mean is equal for classical, country, and rock music. (8b) Yes, you reject the null. The p value is less than alpha (.05). (8c) There is a significant difference between types of music. (9) There is a significant main effect of group. The value of F = 6.75 is larger than the critical value (3.35) (10) A mean of 1 indicates a balance in variance when comparing between-group and within-group means. (11a)

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(11b) Dosage does affect mood, F(2,12) = 7.41, p = .008. (11c) The 10 mg dose showed a higher mood score than the 25 mg dose, p = .008, but no other comparisons were significant, p’s > .08. (12) Type of flight does affect number of adjustment days, F(2,15) = 41.03, p < .001. Eastbound flights produced the longest adjustment (M = 6.0, SD = 1.41), followed by Westbound flights (M = .5, SD = 1.05), and the same time zone flights produced the smallest adjustment (M = 0.5, SD = 0.55).