You have 25 observations of university policeman Sgt. Jack B. Nimble during his normal workday. The results are shown here. Assume that the estimated proportion is to be within 5 percent of the true proportion 95 percent of the time.

(a) Based on your preliminary observations, how many total observations do you need to estimate the proportion of time Sgt. Nimble spends doing paperwork?
(b) How many total observations do you need to estimate the proportion of time Sgt. Nimble spends on the phone?
(c) How many total observations do you need to estimate the proportion of time Sgt. Nimble seems to beunavailable?

Transcribed Image Text:

Number of Times Observed Activity Observed Doing paperwork On the phone Eating doughnuts Cleaning weapon Idle Not in sight 4