=+Use the following MINITAB output to determine whether the data indicate that the mean half-life is higher for those on a normal diet than those on a high-fiber diet. Assume that treatments were assigned at random and the two plasma half-life distributions are normal. Test the appropriate hypotheses using a 5 .01.

Two-sample T for normal vs high N Mean StDev SE Mean Normal 6 27.70 5.44 2.2 High 7 18.61 5.55 2.1 95% C.I. for mu normal – mu high: (2.3, 15.9)

T-Test mu normal = mu high(vs >):T = 2.97 P = 0.0070 DF = 10