Assignment Chapter 11 1 Exercise 11-3 Algo In order to construct a confidence interval for the population variance, a random sample of / observations is drawn from a normal population. Use this information to find x a/2, dy and x21-a/2, of under the following scenarios. (Round your answers to 3 decimal places. You may find it useful to reference the appropriate table: chi-square table or F table) X - a / 2 , of x 2 1 - a /2 , of a . A 95% confidence level with n = 22. b. A 95% confidence level with n = 39. C. A 99% confidence level with n = 22. d. A 99% confidence level with n = 39