Question 7 An F ratio compares to the difference among treatment means; variability due to error. the effect of the independent variable; the effect of extraneous variables. O variability due to...

Extracted text: Question 7 An F ratio compares to the difference among treatment means; variability due to error. the effect of the independent variable; the effect of extraneous variables. O variability due to treatment; variability due to error. O between-groups variability; within-groups variability. Question 8 Experimenters use post hoc tests to O evaluate pairwise differences between treatment means when an analysis of variance is not significant. O determine whether an analysis of variance is required. O compare differences between pairs of means. check the accuracy of analysis of variance computations. Question 9 80 COO 000 DII F3 OOOO