Question 881:

Asked on March 24, 2011

6. The following data represent the results from an
independent-measures study comparing three
treatments.
a. Compute SS for the set of 3 treatment means.
(Use the three means as a set of n  3 scores and
compute SS.)
b. Using the result from part a, compute n(SSmeans).
Note that this value is equal to SSbetween (see
Equation 13.6).
c. Now, compute SSbetween with the computational
formula using the T values (Equation 13.7). You
should obtain the same result as in part b.
Treatment
I II III
n  10 n  10 n  10
M  2 M  3 M  7
T  20 T  30 T  70

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