Concept 2: Confidence Intervals Give More Information:

Goal: I can use a confidence interval to draw a conclusion for a two-sided test about a population proportion.

2. A large-scale U.S. study found that 77% of teenagers have texted while driving. A random sample of 27 teenage drivers in your town was taken and 15 admitted to texting while driving. Use a 99% confidence interval to determine whether there is convincing evidence that the population proportion of teens in your town who text while driving is different than 77%.