15. What is the r-critical value in a sample size of 15 participants? Assume that alpha = .05 and the test is non- Directional. a. .514 b. .574 c. .592 d. .497 16. What is the r-critical value in a sample size of 83 participants? Assume that alpha = .05 and the test is non- Directional. a. .183 b. .217 C. .256 d. .283 Research Designs (3 points each) 17. A researcher wondered whether a person's income (measured in dollars) is related to their level of happiness (measured on a 10-point scale). a. z test b. one-sample t test c. repeated measures ANOVA d. correlation 18. A researcher conducts a study to determine the effectiveness of a new nasal spray to treat seasonal allergies. One hundred adults with seasonal allergies participate in the study. Each person is given one dose of the nasal spray: (a) 25 mcg, (b) 50 mcg, and (c) 75 mcg. The number of times each person sneezed is measured on each of the 3 days. What is the statistical test to determine if the nasal spray has an effect? a. independent groups t test b. correlated groups t test c. one-way between-subjects ANOVA d. repeated measures ANOVA 19. A researcher wants to determine whether laboratory rats' cage size (small cage, medium cage, or large cage affects the number of minutes the rats spend resting in a typical day. Nine rats participate in each condition for one day at a time. That means each rat lives in all of the cages at some point during the study a. independent groups # test b. correlated groups t test c. one-way between subjects ANOVA d. repeated measures ANOVA