Refer to Exercises 16.15 and 16.16.
a. Assuming parallelism of the response lines, perform a test for block differences adjusted for the covariate. Use α = .05.
b. How might you partition the block sum of squares into five meaningful single-degree- of- freedom sums of squares?
c. Write a model and perform the tests suggested in part (b). Use a 5 .05.
In exercise

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Pretreatment Posttreatment Age Block Gender (vears) A F 20 48 F 2040 43 F 40 44 M 20 42 M 20-40 37 M 40 41 31 28 21 17 19 18 17 15 19 31 35 21 24 18 26 21 18 29 34 24 24 26