48. A common complaint of university students is that
tenure-track instructors care a lot more about their
research than their teaching and general availability to students. The file P10_48.xlsx contains hypothetical data on
75 tenure-track instructors where you can check whether
these complaints are justified. The explanatory variables
are (1) whether the instructor holds regular office hours,
(2) average teaching evaluation on a 1–6 scale, and (3)
number of published articles. The dependent variable is
the instructor’s current annual salary. Use regression on
this data set and comment on the results. In particular, can
Salary be explained almost as well by the number of articles as by all three explanatory variables combined?
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