# Confidence interval for the population standard deviation.

Use the given confidence level to find the 80% confidence interval for the population standard deviation.

n=16, X = 66000, s= $7778

Assume that a simple random sample of a population has been selected from a population that has a normal distribution, Use the formula for X2( chi square distribution) and the chi-square distribution table

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#### Solution Preview

Use the given confidence level to find the 80% confidence interval for the population standard deviation.

n=16, X = 66000, s= $7778

Assume that a simple random sample of a population has been selected from a population that has a normal distribution, Use the formula ...

#### Solution Summary

The solution finds the confidence interval for the population standard deviation.

$2.19