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The results from a repeated-measures ANOVA are reported as: F(5, 43) = 3.75, p < .05. For this study, how treatment conditions were compared?

A one-tailed independent-samples t-test was used to examine whether a violent video game increased aggression compared to a non-violent video game. The critical value was 3.76. The test results are as follows: t(78) = 4.30, p < .05, d = 0.21. Which of the following is true?

An independent-measures research study uses two samples, each with n = 12, to compare two treatments. If the results are evaluated with a t statistic using a two-tailed test with α = .01, then what are the boundaries for the critical region?

The results from a repeated-measures ANOVA are reported as: F(3, 23) = 3.75, p < .05. For this study, how treatment conditions were compared?

A professor is using a new teaching method that is supposed to increase his students’ exam scores. A one-tailed t-test was used. The critical value is 2.75 and the obtained value is 2.23. Which of the following is correct?

The numerator of the F-ratio measures the size of the sample mean differences. How is this number obtained, especially when there are more than two sample means?

If the results of a two-factor experiment are presented in a line graph, then what pattern appears in the graph if there is an interaction?

What proportion of scores fall above the z-score of 1.88?

In analysis of variance, a MS value is a measure of ______.

Under what circumstances are post-hoc tests (also called posttests) necessary?