Estimating proportions based on observations

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Reference no: EM1364238

You have twenty-five 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.

Activity Observed
Number of Times Observed

Doing paperwork 9
On the phone 3
Eating doughnuts 3
Cleaning weapon 4
Idle 2
Not in sight 4

Based on your preliminary observations, how many total observations do you need to estimate the proportion of time Sgt. Nimble spends doing paperwork?

How many total observations do you need to estimate the proportion of time Sgt. Nimble spends on the phone?

Reference no: EM1364238

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