Question: Scenario: Earlier in the chapter we estimated a logistic model using the Parkinsons disease (PD) data. The researchers reported on the development of a new

Scenario: Earlier in the chapter we estimated a logistic model using the Parkinson’s disease (PD) data. The researchers reported on the development of a new composite measure of phonation, which they called PPE.

a. Run a logistic regression using PPE as the only regressor, and Status as the dependent variable. Report the results.

b. Compare the results of this regression to the one illustrated earlier in the chapter. Which model seems to fit the data better? Did the researchers succeed in their search for an improved remote indicator for PD?

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