1. A 1% level of confidence is given when ______. A. P = 95% B. none of these C. P = 99% D. P = 1% Hint 2. From a population of 32 items, a sample of 25 items is chosen and found to have a standard deviation of 57.0. Find the standard error of the mean. A. 10.1 B. 7.25 C. 11.4 D. 2.28 Hint 3. Use the partial table below. If = 6.4.0, N = 100, and = 37.1, find the interval about the sample mean that has a 1% level of confidence. A. about 35.45-38.75 B. about 36.04-38.16 C. about 35.18-39.02 D. about 35.85-38.35 Hint 4. If , , and N = 150, find the interval such that the probability is 90% that the mean of the population lies within that interval. Use the table below to help you. A. 48.628–55.103 B. 50.114–53.886 C. 49.760–54.240 D. 49.051–54.949 Hint 5. In a sample of 3,000 used cars, the average number of miles each car has been driven was 23,082 with a standard deviation of 4,608 miles. Find an interval of the number of miles about the sample mean that has a 1% level of confidence. Use the table below to help you. A. 22,917–23,246 B. 23,003–23,160 C. 23,031–23,132 D. 22,865–23,299 Hint