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Unformatted text preview: One more
step in the analysis is a residual plot. For your convenience, I have extracted the data needed
from the original spreadsheet. As before TopMovies2012 has data for the top 100 motion
pictures, sorted from highest to lowest gross (domestic) sales. And, to make your life a little
easier, here is the regression equation that you should have computed in Assignment 2:
Gross = –182,578,108 + 90,392⋅Theatres
Please use this equation here. a) Compute the residuals, and construct a residual plot. Your solution should only show the plot;
do not include the listing of the 100 residuals! Residual Plot $500,000,000 $400,000,000 Dollars ($) $300,000,000 $200,000,000 Residual $100,000,000 $0 0 20 40 60 80 100  $100,000,000  $200,000,000 Movie Rank b) Does the plot show that the linear regression model is appropriate here? Explain in one or two
sentences.
Not in this case. An upward facing curve (polynomial regression) would probably be more appropriate. c) Compute the standard deviation of the residuals (se).
The deviation of the residuals is 45650.41. *** END ***...
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This document was uploaded on 03/27/2014 for the course COMM 291 at University of British Columbia.
 Spring '10
 JohnBerkowitz

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