The McKeesport Fire Department wants to know how likely it is that a truck pump will fail.
Question:
The department statistician runs a regression on a dummy variable (coded 1 for failure and 0 for no failure) for 217 pumps. She finds the following:
= .14 + .01X1 + 05X2
sb1 = .0002 sb2 = .025 sy|x = .04 R2 = .93 Adj. R2 = .92
Write a memo explaining what the regression means. If the average water hardness is 3 and the chief would like to replace any pump with a probability of failing of .80 or more, at what age should pumps be replaced?
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Related Book For
Applied Statistics For Public And Nonprofit Administration
ISBN: 9781285737232
9th Edition
Authors: Kenneth J. Meier, Jeffrey L. Brudney, John Bohte
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