A sample of n = 25 pairs of scores (X and Y values) produces a correlation of r = –0.40. A. Are these sample data sufficient to conclude that there is a significant non-zero correlation between X and Y in the population? Use a two-tailed test at the α = .05 level of significance. B. Which proportion of the variance for the Y scores is predicted by the regression equation?
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A sample of n = 25 pairs of scores (X and Y values) produces a correlation of r = -0.40. a. Are these sample data sufficient to conclude that there is a significant non-zero correlation between X and Y in the population? Use a two-tailed test at the α = 0.05 level of significance. b. What proportion of the variance for the Y scores is predicted by the regression equation?
Madhur L.
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