Question: This figure shows an estimated linear equation along with its 95% prediction intervals. Assume that X counts customers and Y measures dollars. (a) Visually estimate

This figure shows an estimated linear equation along with its 95% prediction intervals. Assume that X counts customers and Y measures dollars.

(a) Visually estimate the intercept b0 and the slope b1.
(b) Is se (b1) less than 3, about 3, or more than 3?
(c) Is the value of r2 approximately equal to 0.2, 0.5, or 0.8?
(d) Estimate se, the standard deviation of the residuals.

1,500 1,000 5001 :!.. .. -500 -1,000 -1,500 -2,000 0 50 100 150 200 250 300 350 400 450

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