The following data were collected to determine the relationship between two processing variables and the hardness of

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The following data were collected to determine the relationship between two processing variables and the hardness of a certain kind of steel:

Fit a plane by the method of least squares, and use it to estimate the average hardness of this kind of steel when the copper content is 0.14 percent and the annealing temperature is 1,100°F.

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John E Freunds Mathematical Statistics With Applications

ISBN: 9780134995373

8th Edition

Authors: Irwin Miller, Marylees Miller

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Question Posted: Nov 04, 2015 04:09 AM

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The following data were collected to determine the relationship between two processing variables and the hardness of

Question:

Annealing Copper content temperature (Rockwell 30-T) ( degrees F) Hardness 78.9 55.2 80.9 57.4 85.3 60.7 0.02 0.02 0.10 0.10 0.18 0.18 1,000 1,200 1,000 1,200 1,000 1.200

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John E Freunds Mathematical Statistics With Applications

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