1.1 1.2 In testing the hypotheses Ho: = 50 vs. H₁: μ50, the following information is known: n = 64, = 53.5, and = 10. The standardized test statistic z equals: a. 1.96 b. -2.80 C. 2.80 d. -1.96 If a hypothesis is not rejected at the 0.10 level of significance, it: a. must be rejected at the 0.05 level. b. may be rejected at the 0.05 level. c. will not be rejected at the 0.05 level. d. must be rejected at the 0.025 level.

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