Q02 Q02 Q02

Suppose a simple random sample of five hospitals is to be drawn from a population of 20 hospitals. There are 15,504 different samples of size 5 that can be drawn. The relative frequency distribution of the values of the mean of these 15,504 different samples would specify the of the mean.

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Q38 Q38 Q38

When determining the sample size, if the population standard deviation, s, is unknown and an estimate is used, the standard deviation should be re- estimated once the sample has been drawn. Next a revised confidence interval should be calculated to determine the precision level actually obtained.

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