A March 2010 Survey USA telephone poll on issues facing central Ohio contacted a random sample of 500 households in the Columbus, Ohio, area. One question was "Where 10 means most important, and 1 means least important, how important is protecting the environment?" The average response was 6.0.
Which of the following is NOT a likely source of error in this survey?

Question

Quizplus · Accepted Answer

The question does not mention a voluntary response sample as a method used in the survey, so bias from voluntary response sample would not be a likely source of error. However, nonresponse, question wording, and undercoverage could potentially introduce error into the survey results.

A March 2010 Survey USA Telephone Poll on Issues Facing