You used radio advertising and newspaper advertising to predict sales (stored in Advertise). Using the results from
Question:
a. Construct a 95% confidence interval estimate of the population slope between sales and radio advertising.
b. At the 0.05 level of significance, determine whether each independent variable makes a significant contribution t the regression model. On the basis of these results, indicate the independent variables to include in this model.
For Information: Problem 14.6
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a 95 confidence interval on b For X 1 with 19 degrees of freedom for a 005 Reject ...View the full answer
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Related Book For 
Statistics For Managers Using Microsoft Excel
ISBN: 9780133130805
7th Edition
Authors: David M. Levine, David F. Stephan, Kathryn A. Szabat
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