Sta2023 Quiz 6 Study Guide Rated A+

Suppose that 76% of Americans prefer Coke to Pepsi. A sample of 80 was taken. What is the probability that at least seventy percent of the sample prefers Coke to Pepsi? {Ans: 0.896}If "np is greater than or equal to 15" and "n(1-p) is greater than or equal to 15", then the sampling distribution of the sample proportion is approximately _______ . {Ans: Normal}As the sample size increases, the standard error of the sampling distribution of the sample proportion decreases. {Ans: True}Suppose that 76% of Americans prefer Coke to Pepsi. A sample of 200 was taken. What is the probability that at least sixty eight percent of the sample prefers Coke to Pepsi? {Ans: 0.9960}Nine percent of Americans say they are well informed about politics in comparison to most people. You randomly sample 200 Americans and ask if they believe that they are well informed about politics in comparison to most people. What is the probability that less than 8% of the people sampled will answer Yes to the question? {Ans: 0.3121}Suppose 60% of American adults believe Martha Stewart is guilty of obstruction of justice and fraud related to insider trading. We will take a