Instructions- Calculate this ANOVA by hand. Check your work by also calculating the ANOVA in SPSS or EXCEL. Be sure to do any multiple comparison tests and interpret the results.
S X (A1)
SST = S X2 – T2/an (also called [X] – [T])
SST = (a = number of groups, n = number in each group)
SSA = S A2 – T2 (also called [A] – [T])
SSS/A = S X2 – S A2 (also called [Y] – [A] )
Now divide by its df to change it to variance. Variance is called Mean Square.
Complete ANOVA summary table on next page.
ANOVA Summary Table
Source SS df MS F
Are the groups significantly different?
Write the results statistically.
What do you do next? Why?
Which groups are different?