A researcher computed a 3 x 3 x 2 repeated measures ANOVA. How many independent variables did the researcher have? How many levels are there in the researcher’s IV(s)? Were there any within subject variables (if so how many)?

Acne is a common skin disease that affects most adolescents and can continue into adulthood. A study compared the effectiveness of three acne treatments and a placebo, all in gel form, applied twice daily for 12 weeks. The study's 517 teenage volunteers were randomly assigned to one of the four treatments. Success was assessed as clear or almost clear skin at the end of the 12 week period. The results of the study can be seen in the table below. Using the appropriate statistical test, determine if there is significant evidence that the four treatments perform differently. If so, how do they compare.

review(5a): Given the ANOVA table below ,how many groups are there? Source                     SS                              df                   MS                           Fstatistic Between                  324 Within                     1215                                                   27 total                      1539                           49 (a) 49 (b) 5 (c) 4 (d) 50

review(5c): Given the ANOVA table below ,how many groups are there? Source                     SS                              df                   MS                           Fstatistic Between                  324 Within                     1215                                                   27 total                      1539                           49 (a) 49 (b) 5 (c) 4 (d) 50

You intend to conduct a test of independence for a con tingency table with 4 categories in the column variable and 6 categories in the row variable. You collect data from 595 subjects. What are the degrees of freedom for the x distribution for this test? d.f. =