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*

conclusion

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