Question: Mr. Mike Wilde is president of the teachers' union for the Otsego School District. In preparing for the upcoming negotiations, he would like to investigate the salary structure of classroom teachers in the district. he believes there are three factors that affect a teacher's salary: years of experience, a rating of teaching effectiveness given by the principal, and whether or not the teacher has a master's degree. A sample of 20 teachers resulted in the following data.



Salary ($1,000’s) Experience Principal's Rating Master's Degree

21.1 8 35 no

23.6 5 43 no

19.3 2 51 yes

33.3 15 60 yes

28.6 11 73 no

35.0 14 80 yes

32.0 9 76 no

26.8 7 54 yes

38.6 22 55 yes

21.7 3 90 yes

15.7 1 30 no

20.6 5 44 no

41.8 23 84 yes

36.7 17 76 no

28.4 12 68 yes

23.6 14 25 no

31.8 8 90 yes

20.7 4 62 no

22.8 2 80 yes

32.8 8 72 no



A. Determine the regression equation. Interpret your results.

B. What salary would you estimate for a teacher with five years' experience, a rating by the principal of 60, and no master's degree?