[Solved] Suppose the number of business majors at liberal arts colleges are normally distributed and have a known population
Suppose the number of business majors at liberal arts colleges are normally distributed and have a known population standard deviation of 21 students and an unknown population mean. A random sample of 35 liberal arts colleges is taken and gives a sample mean of 420 business majors. Use a calculator to find the margin of error for the confidence interval for the population mean with a 90% confidence level. Round your final answer to three decimal places.
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