A town's average snowfall is 40 cm per year with a standard deviation of 5 cm.According to the Normal model,what percent of snowfall is less than 3 standard deviations from the mean?
A)15.87%
B)99.74%
C)5%
D)2.28%
E)0.26%

Question

Quizplus · Accepted Answer

Three standard deviations from the mean includes nearly all of the data (about 99.74%) according to the empirical rule for a normal distribution. Therefore, the percent of snowfall less than 3 standard deviations from the mean is also about 99.74%.

A Town's Average Snowfall Is 40 Cm Per Year with a Standard