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Need a contrast test between Group 1 with a mean of 20 and Group 2 with a mean of 31.44. Group 1 (A) received no

Need a contrast test between Group 1 with a mean of 20 and Group 2 with a mean of 31.44.

Group 1 (A) received no treatment and Group 2 (B,C,D) received treatment.

20 Subjects were divided into 4 groups. 5 subjects per group. D.f. Within = 17 D.f Between = 1.

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