6. A manufacturer of auto windows has developed a new plastic protective material that can be applied much thinner than the conventional material. To use this material, however, the production machinery must be adjusted. A trial adjustment was made on one of the 10 machines used in production, and a sample of 25 windshields measured. This sample had a mean thickness of 2.9 mm. Using the population standard deviation of 0.25 mm, does this adjustment provide for a smaller thickness in the material than the old adjustment with average of 4 mm? (Use a hypothesis test with a = 0.01). %3D

6. A manufacturer of auto windows has developed a new plastic protective material that can be applied much thinner than the conventional material. To use this material, however, the production machinery must be adjusted. A trial adjustment was made on one of the 10 machines used in production, and a sample of 25 windshields measured. This sample had a mean thickness of 2.9 mm. Using the population standard deviation of 0.25 mm, does this adjustment provide for a smaller thickness in the material than the old adjustment with average of 4 mm? (Use a hypothesis test with a = 0.01). %3D

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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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Question

A manufacturer of auto windows has developed a new plastic protective material that can be
applied much thinner than the conventional material. To use this material, however, the
production machinery must be adjusted. A trial adjustment was made on one of the 10
machines used in production, and a sample of 25 windshields measured. This sample had a
mean thickness of 2.9 mm. Using the population standard deviation of 0.25 mm, does this
adjustment provide for a smaller thickness in the material than the old adjustment with
average of 4 mm? (Use a hypothesis test with a = 0.01).
6.

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