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January 30, 2015

January 30, 2015

Posted by **GG** on Tuesday, August 30, 2011 at 9:47pm.

a. Find the sample regression.

b. Interpret the coefficients.

c. Determine the coefficient of determination, and discuss what this statistic tells you.

d. Conduct a test to determine whether the age of a machine and its monthly cost of repair are linearly related.

e. Is the fit of the simple linear model good enough to allow the president to predict the monthly repair cost of a welding machine that is 120 months old? If so, find a 95% prediction interval. If not, explain why not

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