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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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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.) Source of Variation SS df MS F Regression 1 28 Residual Total 118 19 A. X significantly predicts Y. B. X does not significantly predict Y. C. There is not enough information to answer this 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 a .05 level of significance. (Hint: Complete the table first.) Source of Variation SS df MS F Between groups 120 Within groups (error Total 780 A. reject the null hypothesis B. retain the null hypothesis C. There is not enough information to answer this question. 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 / test is appropriate for this study? A. one-sample / test B. two-independent-sample f 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

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