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# Regression results for a bivariate model

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12.59 A common belief among faculty is that teaching ratings are lower in large classes. Below are
MINITAB results from a regression using Y = mean student evaluation of the professor and X =
class size for 364 business school classes taught during the 2002-2003 academic year. Ratings are
on a scale of 1 (lowest) to 5 (highest). (a) What do these regression results tell you about the relationship
between class size and faculty ratings? (b) Is a bivariate model adequate? If not, suggest
additional predictors to be considered.

Predictor Coef SE Coef T P
Constant 4.18378 0.07226 57.90 0.000
Enroll 0.000578 0.002014 0.29 0.774
S = 0.5688 R-Sq = 0.0% R-Sq(adj) = 0.0%

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#### Solution Preview

12.59 A common belief among faculty is that teaching ratings are lower in large classes. Below are MINITAB results from a regression using Y = mean student evaluation of the professor and X = class size for 364 business school classes taught during the 2002-2003 academic year. Ratings are on a scale of 1 (lowest) to 5 (highest). (a) What do these regression results tell you about the relationship between class size and faculty ratings? (b) Is a bivariate model ...

#### Solution Summary

The solution examines regression results for bivariate model.

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