You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% c

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You Are Given The Sample Mean And The Population Standard Deviation Use This Information To Construct The 90 And 95 C 1 (26.45 KiB) Viewed 69 times

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 31 business days, the mean closing price of a certain stock was $114.da. Assume the population standard deviation is $9.89 The 90% confidence interval is (Round to two decimal places as needed.). The 95% confidence interval is ( (Round to two decimal places as needed.) Which interval is wider? Choose the correct answer below The 90% confidence interval The 95% confidence interval Interpret the results. OA. You can be certain that the closing price of the stock was within the 90% confidence interval for approximately 28 of the 31 days, and was within the 95% confidence interval for approximately 29 of the 31 days. OB. You can be 90% confident that the population mean price of the stock is outside the bounds of the 90% confidence interval, and 95% confident for the 95% interval OC. You can be certain that the population mean price of the stock is either between the lower bounds of the 90% and 95% confidence intervals or the upper bounds of the 90% and 95% confidence intervals OD. You can be 90% confident that the population mean price of the stock is between the bounds of the 90% confidence interval, and 95% confident for the 95% interval