In developing a confidence interval for the population standard deviation , we make use of the fact that the sampling distribution of the sample standard deviation s is not the normal distribution or the t-distribution, but rather a right-skewed distribution called the chi-square distribution, which (for this procedure) has n - 1 degrees of freedom.

Question

In developing a confidence interval for the population standard deviation  , we make use of the fact that the sampling distribution of the sample standard deviation s is not the normal distribution or the t-distribution, but rather a right-skewed distribution called the chi-square distribution, which (for this procedure) has n - 1 degrees of freedom.

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This statement is true. When developing a confidence interval for the population standard deviation, we use the chi-square distribution with n-1 degrees of freedom to calculate critical values.

In Developing a Confidence Interval for the Population Standard Deviation