The market research department of a soft drink manufacturer is investigating the effectiveness of a price discount coupon on the purchase of a two-liter beverage product. A sample of 5500 customers was given coupons for varying-price discounts between 5 and 25 cents. The response variable was the number of coupons in each price discount category redeemed after one month. The data is in the picture. a. 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? b. For the quadratic model in part d, find Wald statistics for each individual model parameter. c. Find approximate 95% confidence intervals on the model parameters for the quadratic logistic regression model from part d.
The market research department of a soft drink manufacturer is investigating the effectiveness of a price discount coupon on the purchase of a two-liter beverage product. A sample of 5500 customers was given coupons for varying-price discounts between 5 and 25 cents. The response variable was the number of coupons in each price discount category redeemed after one month. The data is in the picture.
a. 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?
b. For the quadratic model in part d, find Wald statistics for each individual model parameter.
c. Find approximate 95% confidence intervals on the model parameters for the quadratic logistic regression model from part d.
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