Answered: The high-speed automatic Walden machine…

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 high-speed automatic Walden machine produces small washers in series. Experience reveals that 70% of daily production is perfect. Most of the remaining washers or washers have slices that must be filed before they can be installed in a mounting. In an attempt to increase the percentage of production that has no burrs, the machine was slightly modified. A sample of 100 washers was then checked and found to be 72% perfect. The production manager considers that there have been no changes. However, the factory manager believes that the production of the modified machine has definitely improved the quality of the product. That is, the percentage of perfect washers is greater than 70. Is the plant manager correct? Test at the 0.02 level of significance.

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