?Determining Sample Size. In Exercises 19-22, assume that each sample is a simple random

Chapter 7, Problem 19

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Determining Sample Size. In Exercises 19-22, assume that each sample is a simple random sample obtained from a normally distributed population. Use Table 7-2 on page 338 to  find the indicated sample size.

IQ of Statistics Professors You want to estimate \(\sigma\) for the population of IQ scores of statistics professors. Find the minimum sample size needed to be 95% confident that the sample standard deviation s is within 1% of \(\sigma\). Is this sample size practical?

Text Transcription:

sigma

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