A random sample of 21 checking accounts at a bank showed an average daily balance of $430 with a standard deviation of $50.
a.Provide a 95% confidence interval estimate of the variance of the population of the checking accounts.
b.Provide a 95% confidence interval estimate of the standard deviation of the population of the checking accounts.

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The Answer of A random sample of 21 checking accounts at a bank showed an average daily balance of $430 with a standard deviation of $50.
a.Provide a 95% confidence interval estimate of the variance of the population of the checking accounts.
b.Provide a 95% confidence interval estimate of the standard deviation of the population of the checking accounts.

A Random Sample of 21 Checking Accounts at a Bank