2 of 6 View Policies Current Attempt in Progress Your twenty observations of Dr. Knowitall reveal the following information. Assume that the estimate is to be within 9 percent of the true proportion 98 percent of the time. Activity Observed Number of Times Observed With patient 6 Reviewing test results 4 On phone 5 Idle 3 Away on emergency 3 Not available 2. Total 23. Calculate the sample size needed to estimate the proportion of time Dr. Knowitall spends away on emergencies. Sample size needed is? There is a part b,c to this