Use the empirical rule to solve the problem.
-The amount of Jen's monthly phone bill is normally distributed with a mean of $59 and a standard deviation of $8. What percentage of her phone bills are between $35 and $83?
A) 68%
B) 95%
C) 99.99%
D) 99.7%

Question

Quizplus · Accepted Answer

The empirical rule states that 99.7% of data in a normal distribution lies within three standard deviations from the mean. $35 and $83 are three standard deviations below and above the mean ($59 ± 3*$8), respectively.

Use the Empirical Rule to Solve the Problem