The true average diameter of ball bearings of a cer- tain type is supposed to be 0.5 in. What conclusion is ap- propriate when testing Ho: µ = 0.5 versus H„: µ ± 0.5 in each of the following situations: a. n = 13, t = 1.6, a = .05 b. n = 13, t = -1.6, a = .05 c. n = 25, t = -2.6, a = .01 d. n = 25, t = -3.6 %3D %3D

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