21. In one-factor ANOVA for independent samples, which of the following reflects a random variability of scores in the samples?
A. MSbetween
B. MStotal
C. MSwithin
D. A & B
22. A one-factor ANOVA is used to evaluate the mean differences in cognitive task performance between three experimental groups, with n = 15 participants in each group. If the computed F = 3.17, which of the following is the correct statistical decision?
A. Reject the null hypothesis with either α = .05 or α = .01.
B. Reject the null hypothesis with α = .05 but fail to reject with α = .01.
C. Fail to reject the null hypothesis with either α = .05 or α = .01.
D. Fail to reject the null hypothesis with α = .05 but reject with α = .01.
24.A researcher uses a one-factor ANOVA to evaluate the mean difference between two treatments and obtains F(1, 22) = 4.00. If the researcher used a t-test for independent samples to evaluate the data, what would be the computed t statistic?
A. 2.00
B. 8.00
C. 16.00
D. Not enough information given to answer this question.
25. In a one-factor ANOVA for independent samples, the larger the differences between sample means,______________________________.
A. the smaller the numerator of F-ratio will be.
B. the smaller the numerator of F-ratio will be.
C. the larger the numerator of F-ratio will be.
D. the larger the denominator of F-ratio will be.