Question

Using the sample standard deviation as an estimate for the population standard deviation, what size sample should the manager choose if she wishes to estimate the mean number of admissions per 24-hour period to within 1 admission with 99% reliability?

Answer 1

Answer:-

Given that:-

Let n be the rewuired sample size So, margin of error =E=0.01 (with in 1 means 0.01)

Margin of error at 99% reliability

(or 99% confidence interval)

Since p is not given ,we may assume p=0.5, So, 1-p=0.5

Required sample size n=16.641

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