Question: Find the minimum sample size needed to be 95% confident that the sample standard deviation s is within 30% of . Is this sample size

Find the minimum sample size needed to be 95% confident that the sample standard deviation s is within 30% of σ. Is this sample size practical in most applications?

Assume that each sample is a simple random sample obtained from a normally distributed population. Use Table 7-2 on page 376 to find the indicated sample size.

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