A random sample of eight pairs of twins was randomly assigned to treatment A or treatment B. The data are given in the following table.

a. Is there significant evidence that the two treatments differ using an μ = .05 paired t test.
b. Is there significant evidence that the two treatments differ using an μ = .05 sign test.
c. Do your conclusions in parts (a) and (b) agree?
d. How do your inferences about the two treatments based on the paired t test and based on the sign test differ? 

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Twins TreatmentA 48.3 44.6 49.7 405543 55.6 45.8 354 Treatment B 43.5 43.8 53.7 43.9 544 54.7 452 344