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Use the given degree of confidence and sample data to construct a confidence interval for the...

Use the given degree of confidence and sample data to construct a confidence interval for the population standard deviation Assume that the population has a normal distribution.

A laboratory tested seventy-one chicken eggs and found that the mean amount of cholesterol was 215milligrams with s =12.1 milligrams. Construct a 90% confidence interval for the true standard deviation of cholesterol content of all such eggs.

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