QUESTION 11 Imagine that you are hired by a politician to determine the average age of adults in a particular voting district. Based on a random sample of 1,000 adults, the sample mean is calculated as 44 years of age with a sample standard deviation of 15 years, Which of the following is true? A We are 90% condent that the average age of adults in this district is between 42.8 and 45.2 years of age. A, We are 95% condent that the average age of adults in this district is between 42.8 and 45.2 years of age. A, We are 99% condent that the average age of adults in this district is between 42.8 and 45.2 years of age. A The answer cannot be calculated with the infon'nation given. A, None of the above. QUESTION 12 M&M's You are part ofa regulatory agency that is investigating the accuracy of the advertised weight ofa 10ounce bag of M&M's. Suppose you take a sample of 25 bags of M&M's and weigh each bag. The mean weight from your sample is 9.7 ounces with a sample standard deviation of 0.8 ounces. Assume the population of M&M bag weights is normally distributed. M&M's. What is the correct null and alternative hypothesis ifyou wish to test whether or not, on average, the weight ofa bag of M&M's is 10 ounces? A Ho: mi 10 Ha: p =10 A H0: p =10 Ha: 11 10 A Ho: 10 Ha#10 A Ho: 0% 1O Ha:o=10 A None of the above. 1 points 1 points Save Answer Save Answer QUESTION 13 1 points Save Answer M&M's You are part of a regulatory agency that is investigating the accuracy of the advertised weight of a 10-ounce bag of M&M's. Suppose you take a sample of 25 bags of M&M's and weigh each bag. The mean weight from your sample is 9.7 ounces with a sample standard deviation of 0.8 ounces. Assume the population of M&M bag weights is normally distributed. M&M's. Conduct a hypothesis test to evaluate whether or not, on average, a bag of M&Ms is at least 10 ounces. Use a 5% level of signicance. Which of the following is true? a\") The critical value is 1 .711. C' The critical value is 2.054. A The critical values are -2.064 and 2.064. A None of the above