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StatisticsQ&A LibraryDetermining 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.Space Mountain You want to estimate σ for the population of waiting times for the Space Mountain ride in Walt Disney World. You want to be 99% confident that the sample standard deviation is within 1% of σ . Find the minimum sample size. Is this sample size practical?Question

Asked Jan 18, 2020

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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.

Space Mountain You want to estimate σ for the population of waiting times for the Space Mountain ride in Walt Disney World. You want to be 99% confident that the sample standard deviation is within 1% of σ . Find the minimum sample size. Is this sample size practical?

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Table 7-2 shows that the minimum sample size needed, for a confidence level of 99% and a margin of ...

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