Mаny teens hаve pоsted prоfiles оn а social networking websites. A sample survey in 2007 asked a random sample of teens with online profiles if they included false information in their profiles. Of 170 younger teens (aged 12 to 14), 117 said yes. Of 317 older teens (aged 15 to 17), 152 said yes. A 95% confidence interval for the difference between the proportions of younger and older teens who included false information in their online profiles using the standard large-sample procedure is: