On a busy day, the average roller coaster wait time at a
large amusement park is 27 minutes. Suppose the standard deviation
of wait time is 11.9 minutes and the distribution of wait times is
approximately normal.
If it is a busy day, approximately what percentage of
people at the amusement park will have a wait time that is more
than 35minutes?
a) On the normal curve, would we shade to the left or to
the right of 35 minutes?
b) What z-score corresponds to 35 minutes for
this distribution? z =
c) Using the standard normal table, what is the area to
the left of the z-score found in part b?
area to the left =
d) Approximately what percentage of people at the
amusement park will have a wait time that is more than
35 minutes?