A Confidence Interval When the Population Standard Deviation Is Known or Large Sample Size · Try It 2
Refer back to the pizza-delivery Try It 8.1 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.
This exercise builds on another exercise in its source book, which isn't shown here.
OpenStax, Introductory Business Statistics 2e · §8.1 A Confidence Interval When the Population Standard Deviation Is Known or Large Sample Size · Try It 2
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