Question: Running red lights. A random digit dialing telephone survey of 880 drivers asked, "Recalling the last ten traffic lights you drove through, how many of them were red when you entered the intersections " Of the 880 respondents, 171 admitted that at least one light had been red. 19

1. Give a \(95 \%\) confidence interval for the proportion of all drivers who ran one or more of the last ten red lights they mer.
2. Nonresponse is a practical problem for this survey-only \(21.6 \%\) of calls that reached a live person were completed. Another practical problem is that people may not give truthful answers. What is the likely direction of the bias: do you think more or fewer than 171 of the 880 respondents really ran a red light? Why?

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