As an aid in the establishment of personnel requirements, the director of a hosp

Question

As an aid in the establishment of personnel requirements, 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 36 different 24-hour periods and determines the number of admissions for each. For this sample, x = 16.3 and a^2 = 9. Estimate the mean number of admissions per 24-hour period with a 99% confidence interval. 16.3 plusminus 495 16.3 plusminus 1.288 16.3 plusminus 215 16.3 plusminus 3.863

Explanation / Answer

Xbar = 16.3
Z @ 99% is 2.575
n = 36
s^2 = 9

Inputting in formula for CI we have:
Xbar +/- Z*Sqrt(s^2/n)
=16.3+/- 2.575*sqrt(9/36)
=16.3 +/- 1.268
Option B is right answer

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