Practice Test 2 – Answer Key
5. (a) Using the t-distribution for a left-tailed test with α = 0.05 and d.f. = 9, we get tc = -1.833. 6. (c) The “equal” value always goes in the null hypothesis. 7. (b) Since this is a two-sided test and n ≥ 30, we want the critical values ±zc, where -zc corresponds to a cumulative area of α/2 = 0.05. ................
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