Use the One Proportion applet to create an interval of plausible values with 95% confidence for the population proportion of drivers 16 to 17 who have ever talked on a cell phone while driving. Do this by putting different values in for π (and/or using the slider) and seeing whether or not each is plausible.

Let’s use our 3S strategy to help us investigate how much evidence the sample data provide to support our conjecture that a majority of 16- to 17-year olds have talked on their cell phone while driving.