6. Consider testing the hypotheses Ho: = 50 vs. H1: 50. Use a = 0.05 level of significance. If n = 64, = 53.5, and o = 10, then the value of the test statistic is: 4 a. z= 1.96, reject H0. b. t= 1.64, accept H0. c. z=2.80, reject H0. d. t= 1.96, reject HO. е. z%3D1.64, ассept HO.

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