, Question 1 Watches and bacteria: A group of mearchers investigated the saw one r' contamination of medical personnel watches at a New York hospital, since 10 points there is a potential for patient exposure to potentially dangerous bacteria. They sampled watches worn by physicians, physician assistants, and medical students at a teaching hospital in New York. Nearly half (47.7%) of the watches tested harbored microorganisms that can _ cause illness. By comparison, only one of the 10 watches worn by security guards tested positive for a disease-canying microorganism. The researchers want to determine if the difference is statistically signicant. Which of the following is an appropriate statement of the null hypothesis, H o? A. Q The proportion of contaminated wrist-watches from medical personnel is the same as. the proportion of contaminated wrist-watches from security guards, i.e., H C.: p = 47.7%. B. O The proportion of contaminated wrist-watches from medical personnel is not the same as the proportion of contaminated wrist-watches from security guards, i.e., H 0: p not equal 47.7%- C. Q The proportion of contaminatedwrist-watches from medical personnel is greater than the proportion of contaminated wrist-watches from security guards, Le.I H 0: p > 47.7%. Question 2 In 2010 polls indicated that 73% of Americans favored mandatory testing of 55mm\" answer- students in public schools as a way to rate the school. This year in a poll of 1,000 Americans 69% favor mandatory testing for this purpose. Has public opinion changed since 2010? repairin- a We test the hypothesis that the percentage supporting mandatory testing is less than 73% this year. The p-value is 0.014. Which of the following interpretation of this p-value is Valid? A. 0 There is a 1.4% chance that the null hypothesis is true. B. O The probability that Americans have changed their opinion on this issue since 2010 is 0.014. C. 0 H7396 of Americans still favor mandatory testing this year, that poll results will show 69% or fewer with this opinion. i\" then there is a 1.4%'chance