Part 1 of 4 Score: 0 of 1 You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. From a random sample of 71 dates, the mean record high daily temperature in a certain city has a mean of 82.62 F. Assume the population standard deviation is 13.77 F. The 90% confidence interval is (). (Round to two decimal places as needed.) Enter your answer in the edit fields and then click Check Answer. Help Me Solve This View an Example Get More Help - Clear All Check AnswerPart Score: U Of 1 A publisher wants to estimate the mean length of time (in minutes) all adults spend reading newspapers. To determine this estimate, the publisher takes a random sample of 15 people and obtains the results below. From past studies, the publisher assumes o is 2.2 minutes and that the population of times is normally distributed. 10 8 12 11 11 6 11 9 12 12 8 6 7 Construct the 90% and 99% confidence intervals for the population mean. Which interval is wider? If convenient, use technology to construct the confidence intervals. The 90% confidence interval is (, ). (Round to one decimal place as needed.) Enter your answer in the edit fields and then click Check Answer. Help Me Solve This View an Example Get More Help - Clear All Check AnswerQuestion 10, Score: 0 of 1 Save Construct the indicated confidence interval for the population mean u using the t-distribution. Assume the population is normally distributed. c = 0.90, x = 12.8, s=2.0, n=7 (Round to one decimal place as needed.) Enter your answer in the edit fields and then click Check Answer. Help Me Solve This View an Example Get More Help - Clear All Check AnswerPart 1 of 3 Score: U Of 1 In a random sample of 21 people, the mean commute time to work was 33.7 minutes and the standard deviation was 7.2 minutes. Assume the population is normally distributed and use a t-distribution to construct a 90% confidence interval for the population mean u. What is the margin of error of u? Interpret the results. The confidence interval for the population mean u is (].D). (Round to one decimal place as needed.) Enter your answer in the edit fields and then click Check Answer. Help Me Solve This View an Example Get More Help - Clear All Check