Residents of New York state that live near the east end of Lake
Ontario receive large amounts of
winter snowfall, referred to as
"lake-effect" snow. Snowfall
exceeding 6 inches in one day is
not uncommon.
In one city, daily snowfalls in this
range were recorded for one
winter (in inches);
8.6, 9.5, 14.1, 11.5, 7.0, 8.4,9.0,
6.7, 21.5, 7.7, 6.8, 6.1, 8.5, 14.4,
6.1, 8.0, 9.2, 7.1, 10.3, 12.1, 8.3
a) Determine if this data is
normally distributed
b) Find the mean and the standard deviation for this data to the
nearest hundredth.