mes Observed With patient                                    6 Reviewing test results                   1 On phone                                      2 Idle                                               5 Away on emergency                    4 Not available                               4 Total                                           22 (a) Calculate the sample size needed to estimate the proportion of time Dr. Knowitall spends away

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Your twenty observations of Dr. Knowitall reveal the following information. Assume that the
estimate is to be within 8 percent of the true proportion 96 percent of the time.
Activity Observed                         Number of Times Observed
With patient                                    6
Reviewing test results                   1
On phone                                      2
Idle                                               5
Away on emergency                    4
Not available                               4
Total                                           22
(a)
Calculate the sample size needed to estimate the proportion of time Dr. Knowitall spends away
on emergencies.
(Round your answer to the whole number, the tolerance is +/-1.)


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