Question: Job efficiency scores form a normal distribution with s = 32. However, the mean job efficiency varies from one population to another. For example, the

Job efficiency scores form a normal distribution with s = 32. However, the mean job efficiency varies from one population to another. For example, the mean job efficiency for welders is different from the mean for brick layers. A researcher would like to use a sample to obtain information about the mean job efficiency for the population of high school teachers. Which sample mean should provide a more accurate representation of the population: a sample of n = 20 or a sample of n = 36? In eac

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