Question 5.4

5.4 Lurking variables. People who attend church or synagogue are less likely to smoke or be overweight than nonattenders. In the study described in Exercise 5.2,

  1. (a) smoking is a lurking variable, but weight is not.

  2. (b) weight is a lurking variable, but smoking is not.

  3. (c) smoking and weight are both lurking variables.

  4. (d) neither smoking nor weight is a lurking variable.