A survey is conducted on a sample of 1000 individuals about their willingness to pay for online access to the local newspaper. The survey results are summarized in the table below. Would you be willing to pay $5 per month? Yes 28% No 64% I don't know 8% 1. (2 points) Based on the given data, which of the following best describes the 95% confidence interval for the proportion of the population that would respond "I do not know"? (Numbers in each option are rounded to three decimal places.) A) between 6.3% and 9.7% B) between 7.4% and 8.6% C) between 26.0% and 30.0% D) between 61.3% and 66.7% 2. (2 points) Based on the given data, which of the following best describes the 95% confidence interval for the proportion of people that would say "No" among those who do not give a "Yes"? (Numbers in each option are rounded to three decimal places.) A) between 61.0% and 67.0% B) between 62.5% and 65.5% C) between 86.5% and 91.2% D) between 86.9% and 90.9%

The rest of the questions are based on Hypothesis Testing 3. (2 points) The quality control department has collected data on defective products produced over a 24-hour time span. Using a random sample of 800 products, they discover that the average number of defects is 254, while the sample standard deviation is 30. The department wants to conduct a test of whether the average number of defective product is 250 or not. Which of the following statements is true? I. The null hypothesis can be rejected with 68% confidence. II. The null hypothesis can be rejected with 95% confidence. III. The null hypothesis can be rejected with 99.7% confidence. A) I only B) II only C) III only D) All three statements Questions 4-6 are based on the same story as Question 3 except for two changes: (1) the sample mean is now 248; and (2) the sample standard deviation is now 35. 4. (2 points) Which of the following statements is true? I. The null hypothesis can be rejected when the significance level is 0.32. II. The null hypothesis can be rejected when the significance level is 0.05 III. The null hypothesis can be rejected when the significance level is 0.003. A) I only B) II only C) III only D) All three statements 2

5. (2 points) Which of the following statements is true? I. The null hypothesis can be rejected with a confidence level of 60%. II. The null hypothesis can be rejected with a confidence level of 97.5%. A) I only B) II only C) Both I and II D) Neither I nor II

6. (2 points) Which of the following statements is true? I. The null hypothesis can be rejected with a confidence level of 60% or above. II. The null hypothesis can be rejected with a confidence level of 97.5% or above. A) I only B) II only C) Both I and IID) Neither I nor II