Question

Use the given degree of confidence and sample data to find a confidence interval for the population standard deviation sigma. Assume that the population has a normal distribution. Round the confidence interval limits to the same number of decimal places as the sample standard deviation. Weights of? men: 90%? confidence; nequals?14, x overbarequals155.4 ?lb, sequals11.9 lb A. 9.6 lbless thansigmaless than2.7 lb B. 9.1 lbless thansigmaless than17.7 lb C. 8.8 lbless thansigmaless than16.7 lb D. 9.3 lbless thansigmaless than15.4 lb

Answer 1

For 90% confidence interval the critical value are = 22.362

                                                                              = 5.892

The 90% confidence interval for is

= 9.1 < < 17.7

Option - B will be correct.