Question: In an ABCNews.com nationwide poll done in 2001, the proportion of respondents who thought that it should be illegal to use a handheld cellular telephone while driving a car was .69 69%. The poll’s sample size was 1027.

a. Find the value of the standard error of the sample proportion.

b. Find a 95% confidence interval estimate of the population proportion that thinks it should be illegal to use a cellular telephone while driving.

c. Find a 90% confidence interval estimate of the population proportion that thinks it should be illegal to use a cellular telephone while driving.