Answer Happy

Question 2 (12 points) Results from a research study are summarized below. The researcher was interested in the effects of a new drug in reducing cholesterol. She randomly assigned 50 participants to two groups. The first group received the new drug while the second group received a placebo. The researcher believed that the amount of time each person spent exercising might confound the effects of this drug so each person was asked to report this information. The following results were obtained. The R² between the dependent variable (cholesterol) and exercise was computed to be .50. The R² between the dependent variable and the treatment (drug vs. placebo) was found to .60 The R² between the dependent variable and both treatment and exercise was .75 Please answer the following questions regarding this research problem. Specifically, the researcher wants to know if the treatment (drug) has an impact on cholesterol levels, when controlling for the influence of exercise. 2a. What type of analysis is most appropriate for this situation (2 pts) 2b. Describe assumptions which should be examined before applying this analysis. (2 pts.) 2c. Describe the specific steps (NOT in SPSS terms) you would take to investigate this problem. Be specific and be sure to use the information summarized above in any calculations which are necessary to address the research problem. (5 pts) (you might want to use the reverse side or attach an additional sheet here) 2d. What can be concluded about the effects of the treatment on the cholesterol level of subjects? Use the information you analyzed from 3c. (3 pts.)