A professor conducted an experiment to investigate the effect of three different instructional approaches for improving

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A professor conducted an experiment to investigate the effect ofthree differentinstructional approaches for improving learning. Nine subjects arerandomlyassigned to three groups with three subjects in each group, andeducationalmessages presented in treatments 1, 2 & 3. After the treatmentswere applied,the students were scored on the basis of a test.
Summary of the scores is asfollows: SST = 279.556 SS(Approach)= 57.556, T1 = 169, T2 = 187, T3= 182
(a) Test for any differences in mean scores among three differentapproaches.Use α = 0.05.
(b) Is there any difference between Approach 1 and 2 at 5%level?
Show work and explain.