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...

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.)