Based on the dotplot of the simulation results and the
random sample from last month's new driver's licenses,
which conclusion can be drawn?
The actual proportion of teenagers who do not smile
is only 8%.
It is clear that exactly 6 out of 10 teenagers will smile
in their driver's license photo.
If we continued to take more samples of 10
teenagers, the center of the distribution would shift to
6.
There is about an 8% chance that 4 or fewer
teenagers smiled for their photo. This is not unusual
and is not convincing evidence that the true probability
is less than 60%.