Assume that each sample is a simple random sample obtained from a normally distributed population. Use Table
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Assume that each sample is a simple random sample obtained from a normally distributed population. Use Table 7-2 to find the indicated sample size.
Table 7-2
You want to estimate σ for the population of pulse rates for the population of marathon runners. Find the minimum sample size needed to be 99% confident that the sample standard deviation s is within 50% of σ. Is this sample size practical?
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