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Compare 3 treatments and compute SS

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The following data represent the results from an independent-measures study comparing three treatments.

a) compare ss for the 3 set treatment means.(use the three means as a set of n=3 score and compare ss)
b) using the result from part a compute n(ss means)
c) now compute ss between with the computational formula using the t values.

Treatment
1 2 3

n=10 n=10 n=10

m=2 m=3 m=7
t=20 t=30 t=70

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(a) Average of the means (Grand mean) = (2 + 3 + 7)/3 = 4

Sum of squares = (2 - 4)^2 ...

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