Question

Identify a potential source of bias (if any).

Using random digit dialing, 1599 people were called and asked what obstacles (such as childcare) kept them from exercising. (Source: Yankelovich Partners, Inc. for Shape Up America!)

Question 14 options:

Maybe they don't have children.


Using the word "obstacles".


Not asking enough people.


No source of bias.

Answer 1

no source of bias