Question

determine whether the sampling method described below appears to be sound or is flawed. in a survey of 720 subjects, the following question was posted on a newspapers website: in your view, are nuclear plants safe? the survey subjects were internet users who chose to respond to the question posted on the electronic edition of the newspaper. choose the correct answer below. a. it is flawed because it is a voluntary response sample. b. it is flawed because it is not statistically significant. c. it is flawed because it is a census. d. it appears to be sound because the data are not biased in any way.

Explanation:

A voluntary - response sample occurs when subjects themselves choose to respond. Such samples are often biased as those with stronger opinions are more likely to respond. In this case, internet users who chose to respond to the question about nuclear plant safety are a voluntary - response sample and may not represent the entire population accurately.

Answer:

A. It is flawed because it is a voluntary response sample