A company that stamps gaskets out of sheets of rubber, plastic, and cork wants to compare the

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A company that stamps gaskets out of sheets of rubber, plastic, and cork wants to compare the mean number of gaskets produced per hour for three types of material. Two randomly selected stamping machines are chosen as blocks. The data represent the number of gaskets (in thousands) produced per hour. The printout analysis is given.
A company that stamps gaskets out of sheets of rubber,

(a) Why would the stamping machines be chosen as blocks?
(b) Plot the six means for machine and material combinations.
(c) Is there a single material that is best?
(d) Is there an interaction between treatments and blocks? If so, is the interaction causing any serious difficulty in arriving at a proper conclusion? Explain.

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Related Book For  book-img-for-question

Probability & Statistics For Engineers & Scientists

ISBN: 9780131877115

8th Edition

Authors: Ronald E. Walpole, Raymond H. Myers, Sharon L. Myers, Keying Ye

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