1. 29. The regression equation is Ŷ = 30 + 2.58X, the sample size is 22, 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? Multiple Choice A. z = +2.173 B. t = +2.528 C. z = ±2.423 D. t = +2.902
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We want to test whether the slope is positive, so our null hypothesis is that the slope is zero (H0: β = 0) and our alternative hypothesis is that the slope is positive (Ha: β > 0). Show more…
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