A Single Population Mean using the Normal Distribution · Try It 4
Refer back to the pizza-delivery Try It exercise. The population standard deviation is six minutes and the sample mean deliver time is 36 minutes. Use a sample size of 20. Find a 95% confidence interval estimate for the true mean pizza delivery time.
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OpenStax, Introductory Statistics 2e · §8.1 A Single Population Mean using the Normal Distribution · Try It 4
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