F #9 **Question Completion Status:****QUESTION 9**A sample of 20 cans of tomato juice showed a standard deviation of 4 ounces. A 95% confidence interval estimate of the variance for the population is:- a. .2313 to .8533- b. .2224 to .7924- c. .3042 to .5843- d. .0925 to .3413**QUESTION 10**The manager of the service department of a local car dealership has noted that the service times of a sample of 16 new automobiles have a standard deviation of 5 minutes. A 95% confidence interval estimate for the variance of service times for all their new automobiles is:- a. 13.642 to 59.885- b. 9.46 to 34.09- c. 2.144 to 9.948- d. 2.728 to 11.977**QUESTION 11**If there are three or more populations, then it is:- a. possible to test for equality of three or more population proportions.- b. impossible to test for equality of the three population proportions, because chi-square tests deal with only two populations.- c. customary to use a t distribution to test for equality of the three population proportions.*Click Save and Submit to save and submit. Click Save All Answers to save all answers.*

Note- Since you have posted multiple questions, as per our guidelines we are supposed to answer only one question. Given information- Sample size n = 20 Sample standard deviation s = 4 ounces Confidence level = 0.95 Significance level α = 0.05 Degree of freedom df = 20 – 1 = 19