Question: Use the given confidence level and sample data to find a confidence interval for the population standard deviation. Assume that a simple random sample has

Use the given confidence level and sample data to find a confidence interval for the population standard deviation. Assume that a simple random sample has been selected from a population that has a normal distribution.

Salaries of college graduates who took a philosophy course in college.

80% confidence level; n=91, x=$62,800, s=$18,496

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