A$05$ REGRESSION $-$ CH$11$ Regression Estimate and Compare Tools Lifetime

SIMPLE LINEAR REGRESSION

Use file A$05\_$CH$11$P$44\_$TOOLS.txt found on Canvas under Files $/$ Assignments to

answer the following questions $($found as Problem $11\mathrm{.}44$ on page $649$ of your text$).$

Note $-$ organization and clarity are part of your grade on this assignment. Plots should be

properly sized and cropped to fit in the spaces provided.

Please follow the structure provided for this assignment.

Description:

A tool manufacturer suspects the useful life in hours of tools may be related to the speed at

which the tool operates $($speed might predict life, HoursA $[$BrandA$]/$ HoursB $[$BrandB$]).$

Further, there may be a difference between two different brands, BrandA and BrandB.

Conduct two simple linear regression models, one each for BrandA and BrandB.

A$.$ State the Null and Alternative Hypotheses for a Linear Regression Model

B$.$ State the Assumptions of a Linear Regression Model