HS 167-$20 - Final Exam - Part B 2) Independent Samples. [15 points] Given the summary statistics for group 1 and 2 in the table below, conduct a 2-sided test to see whether the mean difference between the two independent groups is significantly different. Sample size Mean Standard deviation Group 1 15 3.67 1.91 Group 2 10 5.90 2.02 i. Hypothesis Statements ii. t-test statistic ii. degree of freedom iv. p-value v. Conclusion At alpha=0.05, do you reject or retain the Null? Is the observed difference significant? This study source was downloaded by 100000768031015 from CourseHero.com on 12-08-2022 01:40:45 GMT -06:00 2/4 https:/www.courschero.com/file/88391655/HIS167-520-PhamFinal-PartBpdfHS 167-$20 - Final Exam - Part B 3) Alternative medicine. [15 points] According to a New York Times article, a nationwide telephone survey conducted found that of 1500 Americans interviewed, 660 said they would use alternative medicine if traditional medical care failed to produce the desired results. We believe that half of Americans would consider use of alternative medicine. Test whether the proportion in the New York Times study is significantly different from our belief. (2-sided test) i. Hypothesis statements ii. z-test statistic iii. p-value iv. Conclusion This study source was downloaded by 100000768031015 from CourseHero.com on 12-08-2022 01:40:45 GMT -06:00 3/4 https:/www.courschero.com/file/88391655/HS167-520-PhamFinal-PartBpdfHS 167-$20 - Final Exam - Part B 4) Claims about Dark Chocolate. [20 points] Some studies have indicated that the compounds called flavanols are thought to be responsible for many of chocolate's beneficial effects, especially in dark chocolate (70% cocoa or more). Consumption of dark chocolate may help in lowering blood pressure and increase blood flow to the heart. An observational study was conducted to examine this claim. (Fictitious data) Data after a 10-year period revealed that for 430 participants who consumed dark chocolates, there were 8 incidences of coronary disease. Among those who did not eat dark chocolates, there were 15 cases and 672 non-cases. Fill in all the cells of the 2-by-2 table below. Coronary disease Cases Non-cases Total Dark chocolate No dark chocolate Total A. What is the incidence proportion of coronary disease among dark chocolate consumers and non-consumers? (Report to 4 decimal places) P1 = P2 = B. What is the relative risk of coronary disease associated with dark chocolate consumption? C. Interpret the relative risk calculated in part B. D. Calculate the 95% confidence interval for the risk ratio. E. Based on your 95% Cl, is there a significant association between eating dark chocolate and heart disease? This study source was downloaded by 10000076803 1015 from CourseHero.com on 12-08-2022 01:40-45 GMT -06:00 4/4 https:/www.courschero.com/file/88391655/HIS167-520-PhamFinal-PartBpdf