A 2009 Pew Research Survey of a nationallyrepresentative sample of 242 cell phone users, aged 16 to 17 years,found that 52% had talked on the phone while driving.
1. Find a 98% confidence interval for the percentage of allcell phone users aged 16 to 17 years old who have talked on thephone while driving.
2. Do these data provide evidence that a majority of 16 to17 year old cell phone users talk on the phone whiledriving?
3. What sample size is needed for you to estimate thepercentage of all cell phone users aged 16 to 17 years old who havetalked on the phone while driving to within a margin of error of0.5%?
