Answered: A manufacturer must test that his bolts…

Name: A manufacturer must test that his bolts are 5.00cm long when they come
Uploaded: 2024-03-20T07:07:12.000Z
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Description: A manufacturer must test that his bolts are 5.00cm long when they come off the assembly line. He must recalibrate his machines if the bolts are too long or too short. After sampling 121 randomly selected bolts off the assembly line, he calculates the

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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A manufacturer must test that his bolts are 5.00cm long when they come off the assembly line. He must recalibrate his machines if the bolts are too long or too short. After sampling 121 randomly selected bolts off the assembly line, he calculates the sample mean to be 4.87cm. He knows that the population standard deviation is 0.76cm. Assuming a level of significance of 0.05, is there sufficient evidence to show that the manufacturer needs to recalibrate the machines?

Step 2 of 3 :

Compute the value of the test statistic. Round your answer to two decimal places.

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