Over the years, the mean customer satisfaction rating at a local restaurant has been 85. The restaurant was recently remodeled, and now the managementclaims the mean customer rating, u, is not equal to 85. In a sample of 42 customers chosen at random, the mean customer rating is 83.1. Assume that thepopulation standard deviation of customer ratings is 5.3.Is there enough evidence to support the claim that the mean customer rating is different from 85? Perform a hypothesis test, using the 0.05 level ofsignificance.(a) State the null hypothesis H, and the alternative hypothesis H,.H,: IOOH: 0D=D0(b) Perform a Z-test and find the p-value.Here is somne information to help you with your Z-test.• The value of the test statistic is given by Standard Normal Distribution0.4Step 1: Select one-tailed or two-tailed.One-tailedO Two-tailed0.3+Step 2: Enter the test statistic.(Round to 3 decimal places.)0.2+Step 3: Shade the area represented bythe p-value.Step 4: Enter the p-value.(Round to 3 decimal places.)2.

Answered: Image /qna-images/answer/fe9b60d6-859b-49f3-b9fa-9d4f743c1627.jpg

Answered: Over the years, the mean customer…

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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The tallest living man at one time had a height of 243 cm. The shortest living man at that time had a height of 127.5 cm. heights of men at that time had a mean of 170.52 cm and a standard deviation of 6.62. Which of these two men had the height that was more extreme? Use z scores
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