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Fitting of simple linear regression equation.
Circulation is the lifeblood of the publishing business. The larger the sales of themagazine , the more it can charge advertisers. Recently, a circulation gap has apperared between the publishers reports of the magazines newsstand sales and subsequent audits by the Audit Bureau of circulations. The data in the file Circulation represents the reported and audited newsstand sales(in thousands) in 2001 for the following 10 magazines:
Magazines
reported(X)
Audited(Y)
YM
621.0
299.6
COS GIRL
359.7
207.7
ROSIE
530.0
325.0
PLAYBOY
492.1
336.3
ESQUIRE
70.5
48.6
TEEN PEOPLE
567.0
400.3
MORE
125.5
SPIN
50.6
39.1
VOGUE
353.3
268.6
ELLE
263.6
214.3
a) Construct a scatter plot.
b) Interpret the meaning of slope, b1, in this problem
c) Predict the mean audited newsstand sales for a magazine sales of 400,000
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