A researcher used a one-factor ANOVA for between-groups to test the effectiveness of four teaching methods for autistic children. The experiment was conducted with four samples of n = 12 autistic children in each group. The results of the analysis are shown in the following summary table.
Source SS df MS
Between Treatments ____ ____ ____ F = 5.00
Within Treatments 88 ____ ____
Total ____ ____
A. missing values in the table
B. Do these data indicate any significant differences among the four teaching methods (assume p < .05)?
the null hypothesis H0 & the alternative hypothesis H1
the critical F value used for the decision about H0
if the difference is statistically significant, compute the effect size, η2
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