The Director of a Hospital Wishes to Estimate the Mean

Multiple Choice

The director of a hospital wishes to estimate the mean number of people who are admitted to the emergency room during a 24-hour period. The director randomly selects 64 different 24-hour
Periods and determines the number of admissions for each. For this sample, x = 19.8 and s2 = 36. If
The director wishes to estimate the mean number of admissions per 24-hour period to within 1
Admission with 90% reliability, what is the minimum sample size she should use?

A) 3508
B) 60
C) 98
D) 2132