Researchers did an experiment to measure the effects of sleep on memory. Participants were divided into three groups: 4-hour sleep group, 6-hour sleep group, and 8-hour sleep group. After the night of rest, all participants were given a memory test. What is the independent variable? What are the levels of the independent variable? What is the dependent variable? This experiment is utilizing a design. a. Between-subjects b. Within-subjects c. Mixed d. None of the above The null hypothesis states that there will be a difference in memory based on the amount of sleep one receives. TRUE OR FALSE What type of test should the researcher conduct in order to test for overall significance between the groups? To determine the percentage of variability in the DV that is attributed to the IV, the researcher can a. Divide the F ratio by the critical value. b. Calculate HSD. c. Look at the "sig." level on SPSS output d. Calculate eta squared After computing the F statistic, one should always conduct post-hoc tests. TRUE OR FALSE A significant F results when at least pair of group means are significantly different from one another. What is the "One" referring to in "One-way ANOVA"?