Question 138863
 Regression analysis of free throws by 29 NBA teams during the 2002–2003 season revealed 
the fitted regression Y(X) = 55.2 + .73X 
(R2 = .874, syx = 53.2) 
where Y = total free throws made 
and X = total free throws attempted.
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The observed range of X was from 1,620 (New York Knicks) to 2,382 (Golden State Warriors). 
(a) Find the expected number of free throws made for a team that shoots 2,000 free throws.
Y(X) = 55.2 + .73X 
Y(2000) = 55.2 + 0.73*2000 = 1515,2
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(b) Do you think that the intercept is meaningful?
The intercept says 55.2 free throws will be made when zero free throws 
are attempted.  Hardly realistic.
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Hint: Make a scatter plot and let Excel fit the line. 
(c) Use the quick rule to make a 95 percent prediction interval for Y when X = 2,000.
I'm not familiar with the "Quick Rule".
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Cheers,
Stan H.