A researcher is interested in whether three different teaching methods are equally effective for students of different reading levels on their reading scores. Students from high, middle, and low reading levels are randomly assigned to one of three teaching methods. Students reading scores are recorded below. For the data below, use critical value of .05 in the data analysis.

Teaching method

1. 2. 3

High reading levels. 40. 32. 30

36. 29. 35

38. 36. 33

36. 35. 38

Medium reading levels. 24. 20. 18

21. 29. 26

20. 25. 26

20. 30. 25

Low reading levels. 22. 20. 18

18. 18. 14

16. 19. 19

20. 15. 19

a. Identify the IV and the DV

b. Run a factorial ANOVA on the DV and send me the output

c. Explain the test results of the assumption of homogeneity