For the following five exercises, you will need to construct indicator variables to use categorical variables as explanatory variables in logistic regression. Be sure to review the material in Chapter 11 on models with categorical explanatory variables (pages 571-575) before attempting these exercises.

Question 17.37

17.37 Rerun the analysis with a different coding.

In the previous exercise, you used the last category, general interest, for the “other” designation when you constructed the indicator variables. Now use the women's magazine readership as the “other” category and reanalyze the data. Verify that the significance testing results for the effect of the two explanatory variables is the same as in the previous exercise.

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17.37

The estimated model becomes
Now both men
and general terms are significant.