Table 1 Source df SSQ MS F p Subjects 23 578198 25139 Dosage

Table 1: Source df SSQ MS F p
Subjects 23 5781.98 251.39
Dosage 1 295.02 295.02 10.38 0.004
Error 23 653.48 28.41
Total 47 6730.48

Table 2: Source df SSQ MS F p
Subjects 23 9065.49 394.15
Dosage 3 557.61 185.87 5.18 0.003
Error 69 2476.64 35.89
Total 95 12099.74

(AT) The dataset ADHD Treatment has four scores per subject.

            a. Is the design between-subjects or within-subjects?

            b. Create an ANOVA summary table.

(AT) Using the Anger Expression Index from the Angry Moods study as the dependent variable, perform a 2x2 ANOVA with gender and sports participation as the two factors. Do athletes and non-athletes differ significantly in how much anger they express? Do the genders differ significantly in Anger Expression Index? Is the effect of sports participation significantly different for the two genders?

Solution

a. This is a within subject design as the subjects are common for both the design.

b. The summary tables are:

Table 1

Table 2

Since p-value for athletes and non-athletes is 0.000 < alpha, we can say that differ significantly in how much anger they express.

Since p-value for gender is 0.000 < alpha, we can say that the genders differ significantly in Anger Expression Index.