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 77 dates, the mean record high daily temperature in a certain city has a mean of 84.21°F. Assume the population standard deviation is 14.47°F. The 90% confidence interval is O (Round to two decimal places as needed.) The 95% confidence interval is OD (Round to two decimal places as needed.) Which interval is wider? Choose the correct answer below. O The 90% confidence interval O The 95% confidence interval Interpret the results. O A. You can be certain that the population mean record high temperature is either between the lower bounds of the 90% and 95% confidence intervals or the upper bounds of the 90% and 95% confidence intervals. O B. You can be 90% confident that the population mean record high temperature is outside the bounds of the 90% confidence interval, and 95% confident for the 95% interval. OC. You can be certain that the mean record high temperature was within the 90% confidence interval for approximately 69 of the 77 days, and was within the 95% confidence interval for approximately 73 of the 77 days. O D. You can be 90% confident that the population mean record high temperature is between the bounds of the 90% confidence interval, and 95% confident for the 95% interval.

You measure 50 turtles' weights, and find they have a mean weight of 60 ounces. Assume the population standard deviation is 2.8 ounces. Based on this, construct a 99% confidence interval for the true population mean turtle weight.Give your answers as decimals, to two places

A statistics practitioner took a random sample of 49 observations from a population and computed the sample mean to be 100. For each confidence interval, enter your answer in the form (LCL, UCL). You must include the parentheses and the comma between the confidence limits.   A. Suppose the population standard deviation is 28. Estimate the population mean with 95% confidence. Confidence Interval =  B. Suppose the population standard deviation is 41. Estimate the population mean with 95% confidence. Confidence Interval =  C. Suppose the population standard deviation is 10. Estimate the population mean with 95% confidence. Confidence Interval =

Tina catches a 14-pound bass.  She does not know the population mean or standard deviation.  So she takes a sample of five friends and they say the last bass they caught was 9, 12, 13, 10, and 10 pounds.  Find the t and calculate a 95% (α = .05) confidence interval.