An operations manager is interested in modeling E(y), the expected length of time per month (in hours)

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An operations manager is interested in modeling E(y), the expected length of time per month (in hours) that a machine will be shut down for repairs, as a function of the type of machine (001 or 002) and the age of the machine (in years).

a. Write a complete second-order model for machine downtime (y) as a function of age and machine type.

b. Give the reduced model required to determine whether the second-order terms in the model are necessary.

c. Give the reduced model required to determine whether the machine-type terms are necessary.

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Statistics For Engineering And The Sciences

ISBN: 9781498728850

6th Edition

Authors: William M. Mendenhall, Terry L. Sincich

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