Question
21. A researcher computes the following one-way between-subjects ANOVA table for a study, where k = 3 and n = 12. State the decision at
21. A researcher computes the following one-way between-subjects ANOVA table for a study, where k = 3 and n = 12. State the decision at a .05 level of significance. (Hint: Complete the table first.)
22. A researcher conducts two studies on child health. In Study 1, 30 children consume either a low-, moderate-, or high-fat meal (n = 10 per group). In Study 2, the researcher conducts the same study, except that a No Meal control group is added, with n = 10 in each group. If Fobt = 3.11 in both studies, then in which study will the decision be to reject the null hypothesis at a .05 level of significance for a one-way between-subjects ANOVA?
A. Study 1 B. Study 2 C. Study 1 and Study 2 D. none of these
23. A researcher records the number of distracters (such as noises) that preschool-aged children ignore while watching a popular Sunday morning cartoon show. Assuming that the population variance is unknown, what type of t test is appropriate for this study?
A. one-sample t test B. two-independent-sample t test C. There is not enough information to answer this question.
24. A researcher measures the relationship between narcissism and willingness to help. If SSXY = 240, SSX = 320, and SSY = 410, then what is the value of the correlation coefficient?
A. .002 B. .02 C. .66 D. .69 7
25. A researcher computes the following analysis of regression table. Based on the data given, what is the decision for this test at a .05 level of significance? (Note: Complete the table first.)
A. X significantly predicts Y. B. X does not significantly predict Y. C. There is not enough information to answer this question.
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