Question: Suppose r2 = .95. (a) Explain why this does not provide convincing evidence that the least squares line provides a good fit to a scatterplot

Suppose r2 = .95.

(a) Explain why this does not provide convincing evidence that the least squares line provides a good fit to a scatterplot of the points.

(b) If the least squares line provides a poor fit, what does this say about using Yˆ versus Y¯ to estimate Y .

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