polls that interest you or to post one of your own. Once you have found a poll o

Question

polls that interest you or to post one of your own. Once you have found a poll of interest, you just click on "Vote," and your response becomes part of the sample. One of the questions in July 2010 was, "How many times have you been pulled over by the police?" Of the 780 people responding, 70% said" 1-5 times." You can conclude that (a) about 70% of Americans have been pulled over by the police "1-5 times." ó) the poll uses voluntary response, so the results tell us litte about the population of all adults. (c) more people still need to vote on the question, as a larger sample is required to reduce bias. 8.20 The website www.twiigs.com allows you to vote on

Explanation / Answer

(b) option is correct

Since

A voluntary response sample is a sample made up of volunteers. Compared to a random sample, these types of samples are always biased. For example, people who call in to a radio show poll may have strong opinions about a topic in either direction.

In this case the response is also voluntary so the results have to be biased so they can tell about the probability of population

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