Question: Ten randomly selected shut-ins were each asked to list how many hours of television they watched per week. The results were:

82 66 90 84 75 88 82 94 110 91

(a) Find x-bar

(b) Find s

(c) How many degrees of freedom will you use in this problem?

(d) Determine the 90% Confidence interval estimate for the mean number of hours of
television watched per week by shut-ins. Assume the number of hours is normally
distributed

(e) What is the length of the 90% CI?