please make sure answer is correct thanks.

"The 1nsurance institute for Highwav Safety ssued a press release titled "Teen D ers often ignoring Balls on Us ng Cellphones (June 9. 2098). The following quote is from the press release. Just 1,2 months prior to the ban's Dec. 1, 2005 start, 11 percent of teen drivers were observed using cell phones as thev left school in the ahemoon. About 5 rnonths alter the ban took effect, 12% of teen drivers were observed using cell phones. suppose that the two samples of teen drivers (before the ban. alter the ban) can be regarded as representative of these populations of teen drivers. suppose also that 20d teen drivers were observed before the ban (so ri1 : 200 and p1 : 0.11) and 125 teen drivers were observed aer the ban. IA use SA (a) Construd a 95% condence interval for the difference in the proportion using a cell phone while driving before the ban and the proportion afterthe ban. (Use pm"? s paw. hound your answers to three decimal places.)