PSYCH 3090 Lecture Notes - Lecture 36: F-Test, Analysis Of Variance, Psych
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Effect size in anova: eta-squared, measure of association between the iv and dv, provides the proportion of the total variance due to the iv (eq. 2: 0. 01 = small, 0. 06 = medium, 0. 14 = large. Post hoc comparisons: although our f test in anova indicated that the population means are not equal, we do not know precisely how the differ, when our f ratio is statistically significant, we may proceed with other comparisons. These are post hoc comparisons: we will consider a post hoc comparison by tukey. N: = harmonic mean of sample size, q = table f (appendix d) =4. 62: k = number of groups, k is divided by sum of reciprocals q (studentized range statistic, table f in appendix d. In our example, dfw = 11, k = 3, and = 0. 05: q = 3. 82 o o o o, the critical hsd is.
