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What is different about the normality requirement for a confidence interval estimate of sigma and the...

What is different about the normality requirement for a confidence interval estimate of sigma and the normality requirement for a confidence interval estimate of mu​? The normality requirement for a confidence interval estimate of sigma is ▼ less strict stricter than the normality requirement for a confidence interval estimate of mu. Departures from normality have a ▼ lesser greater effect on confidence interval estimates of sigma than on confidence interval estimates of mu. That​ is, a confidence interval estimate of sigma is ▼ more less robust against a departure from normality than a confidence interval estimate of mu.

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The normality requirement for a confidence interval estimate of σ has a much stricter normality requirement than the loose normality requirement for a confidence interval estimate of µ. Departures from normality have a much greater effect on confidence interval estimates of σ than on confidence interval estimates of µ.That​ is, a confidence interval estimate of sigma is  less robust against a departure from normality than a confidence interval estimate of mu.

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