The regression equation is Ŷ = 29.29 - 0.90X. The sample size is 26, and the standard error of the slope is 0.22. What is the critical value to test whether the slope is different from zero at the 0.01 significance level? Multiple Choice: z = ±1.666 z = +1.416 t = +2.445 t = ±2.797
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The regression equation is Ŷ = 30 + 2.56X, the sample size is 16, and the standard error of the slope is 0.99. What is the critical value to test whether the slope is positive at the 0.01 significance level? Group of answer choices t = +2.624 z = ±2.519 t = +2.998 z = +2.269
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