An experiment is performed to compare the average reading scores of second grade children taught using four different methods. Students are randomly assigned to the four groups with 20 students per group. An analysis of variance is to be used to analyze the data. The following is a partially completed ANOVA table. Fill in the remaining details State the null and alternative hypothesis Solution H0: There is no difference in the average scores of all the groups. H0: 1 = 2 = 3 = 4 H1: There is a difference in the average scores of all the groups. H1: 1234.