IBM PureData System for Analytics V7.0 — Question 5

You need to determine whether a variable should be removed in the stepwise variable selection methods in logistic regression.
Which two metrics are used to accomplish this task? (Choose two.)

Answer options

• A. Wald Statistic
• B. KS-Statistic
• C. Likelihood Ratio (LR) Statistic
• D. Z-Statistic

Correct answer: A, D

Explanation

The Wald Statistic and Z-Statistic are both used to assess the significance of individual predictors in logistic regression. The KS-Statistic and Likelihood Ratio Statistic, while useful in other contexts, do not specifically evaluate the necessity of variables in the stepwise selection process.