1. 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 81 different 24-hour periods and determines the number of admissions for each. For this sample, X = 19.7 people and s = 4 people. The 98% confidence interval for the mean number of people admitted per 24-hour period is: a. 19.7+0.115 people. b. 19.7+0.436 people. c. 19.7+ 1.036 people. d. 19.7+4.142 people