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.

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.

Intermediate Algebra

19th Edition

ISBN:9780998625720

Author:Lynn Marecek

Publisher:Lynn Marecek

Chapter12: Sequences, Series And Binomial Theorem

Section12.3: Geometric Sequences And Series

Problem 12.58TI: What is the total effect on the economy of a government tax rebate of $500 to each household in...

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