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Question 1 Watches and bacteria. A group of researchers investigated the Selecte er contamination of...
Question 1 Watches and bacteria. A group of researchers investigated the Selecte er 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 (46.8%) 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-carrying microorganism. The researchers want to determine if the difference is statistically significant Which of the following is an appropriate statement of the null hypothesis, H.?! A. The proportion of contaminated wristwatches from medical personnel is the same as the proportion of contaminated wristwatches from security guards, i.e., H P -46.8%. B. 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:p not equal 46.8%. C. The proportion of contaminated wrist-watches from medical personnel is greater than the proportion of contaminated wrist-watches from security guards, i.e., H:P > 46.8%. Question 2 Genetically modified foods: According to a 2016 Pew Research survey, a Select one or majority of the American general public (55%) says that genetically modified 10 points (GM) foods are generally unsafe to eat. This month, in a survey of 500 randomly selected American adults, 59% says that GM foods are generally unsafe to eat. We test the hypothesis that the percentage who says that GM foods are generally unsafe to eat is greater than 55% this year. The p-value is 0.085. Which of the following interpretations of this p-value is valid? A. Assuming that more than 55% of Americans feel that GM foods are unsafe, the probability that 59% of 500 randomly selected Americans say that GM foods are generally unsafe to eat is 0.085. B. If we assume that 55% of Americans says that GM foods are generally unsafe to eat, then there is an 8.5% chance that random sample results will show 59% or more who says that GM foods are generally unsafe to eat. C. There is an 8.5% chance that 55% of Americans says that GM foods are generally unsafe to eat