Question: Refer to Exercise 17 35 a Group the types of alloys

Refer to Exercise 17.35.
a. Group the types of alloys such that alloys within a group have similar mean hardness scores.
b. Group the types of condensation methods such that alloys within a group have similar mean hardness scores.
c. Estimate the variation in the mean hardnesses due to the dentist.
d. Use the residuals from the fitted model to determine if there are any violations in the conditions necessary to conduct the tests of hypotheses in this experiment.


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  • CreatedNovember 21, 2015
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