Stat

[Guest]

The press release referenced in the previous exercise
also included data from independent surveys of teenage
drivers and parents of teenage drivers. In response to
a question asking if they approved of laws banning the
use of cell phones and texting while driving, 74% of the
teens surveyed and 95% of the parents surveyed said they
approved. The sample sizes were not given in the press
release, but for purposes of this exercise, suppose that
600 teens and 400 parents of teens responded to the
surveys and that it is reasonable to regard these samples
as representative of the two populations. Do the data
provide convincing evidence that the proportion of teens
that approve of cell-phone and texting bans while driving
is less than the proportion of parents of teens who approve?
Test the relevant hypotheses using a significance
level of .05.