Section 6.2

Construct the indicated confidence interval for the population mean p using the t-distribution. Assume the population is normally distributed. c= 0.99, x = 13.6, s=30, n=5 COLD 1.) (Round to one decimal place as needed.) Construct the Indicated confidence interval for the population mean u using the t-distribution. Assume the population is normally distributed c = 0.98, x = 12.1, s= 0.84, n= 13 (Round to one decimal place as needed.) 2.) In a random sample of 26 people, the mean commute time to work was 31.2 minutes and the standard deviation was 7.1 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 p? Interpret the results. The confidence interval for the population mean p is (Round to one decimal place as needed.) 3.)In a random sample of ten people, the mean driving distance to work was 25.1 miles and the standard deviation was 4.5 miles. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 95% confidence interval for the population mean u. Interpret the results. 4.) -Identify the margin of error. (Round to one decimal place as needed.) -Construct a 95% confidence interval for the population mean. (Round to one decimal place as needed.) In a random sample of six cell phones, the mean full retail price was $485.00 and the standard deviation was $177.00. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 90% confidence interval for the population mean . Interpret the results. 5.) -Identify the margin of error. (Round to one decimal place as needed.) -Construct a 95% confidence interval for the population mean. (Round to one decimal place as needed.)