The market research department of a soft drink manufacturer is investigating the effectiveness of a price discount
Question:
(a) Fit a logistic regression model to the data. Use a simple linear regression model as the structure for the linear predictor.
(b) Is the logistic regression model in part (a) adequate?
(c) Draw a graph of the data and the fitted logistic regression model.
(d) Expand the linear predictor to include a quadratic term. Is there any evidence that this quadratic term is required in the model?
(e) Draw a graph of this new model on the same plot that you prepared in part (c). Does the expanded model visually provide a better fit to the data than the original model from part (a)?
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Related Book For
Applied Statistics And Probability For Engineers
ISBN: 9781118539712
6th Edition
Authors: Douglas C. Montgomery, George C. Runger
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