8.2 Suppose average pizza delivery times are normally distributed with an unknown population mean and a population standard deviation of six minutes. A random sample of 28 pizza delivery restaurants is taken and has a sample mean delivery time of 36 minutes.Find a 90% confidence interval estimate for the population mean delivery time.Solution AIdentify values to plug into the formula \( \bar{x} \pm \left( z_{\frac{\alpha}{2}} \right) \left( \frac{\sigma}{\sqrt{n}} \right) \)Write solution first as \( \bar{x} \pm EBM: \) _____________________________Write solution in interval notation: ( ___________ , ___________ )Solution BCheck your “by hand” work by running a ZInterval test:Interpretation______________________________________________________________________________________________________________________________________________________________________________________________________

Solution: Given information: n= 28 Sample size x = 36 Sample mean σ= 6 Population standard deviation

Answered: 8.2 Suppose average pizza delivery…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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