Listed below are the reading quiz scores from a class of 15 first graders who were assigned to three different reading groups: ( 1) reading aloud with an adult; (2) reading aloud with an older student; and (3) reading aloud with a classmate:
Compute the effect parameters (a; ) for each treatment condition. Then calculate the total sum of squares, the between sum of squares and the within sum of squares. Determine the mean . square; and the F ratio, and evaluate it against the null hypoes IS that the three population means are equal, setung a= .05. Disp]ay these results in an ANOVA summary table. Finally, compute and interpret the results.