What fraction of the variation is explained? Consider the
Chapter , Problem 2.65(choose chapter or problem)
What fraction of the variation is explained? Consider the following correlations: 0.8, 0.4, 0.2, 0, 0.3, 0.5, and 0.9. For each give the fraction of the variation in y that is explained by the least-squares regression of y on x. Summarize what you have found from performing these calculations. US
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