QUESTION 3 (Multiple Choice) A sample of 20 items provides a sample standard deviation of 6, Compute the 90%% confidence interval estimate of the population variance. OA 7.7911 3g2 521.5783 O B. Cannot be computed or none of the above. O C.9.3616 502 5 24 3272 O D. 22 6911 5 02 5 67 6090 OF. 26.6679 so 2 s 89.1462 OF. 27 6603 so 2 5 78.4138 QUESTION 4 (Multiple-Choice) Given that F is an F random variable (with degrees of freedom 4 and 8), compute the following probability; P(F - $.05)-? OAlO B. O.OS C. 0:025 OD.0.01 OE, 0.1 OF. 0.0 QUESTION 5