A simple random sample of size 400 was taken from the population
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A simple random sample of size 400 was taken from the population

2. A simple random sample of size 400 was taken from the population of all manufacturing establishments in a certain state; 11 establishments in the sample had 100 employees or more. Estimate the percentage of manufacturing establishments with 100 employees or more. Attach a standard error to the estimate.

Hint
StatisticsWhen comparing a population mean to a sample mean, the standard error of the mean, or simply standard error, shows how dissimilar the two are likely to be. It informs you of the degree to which the sample mean would fluctuate if the study were to be repeated with fresh samples drawn from the same population....

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