The hourly production of a plastic cup company is tracked over several months and is found to be normally distributed.Given a mean of 15,630 cups and a standard deviation of 251 cups, about what percent of all hours of production should produce between 15,128 and 16,132 cups?
A)50%
B)68%
C)75%
D)95%
E)nearly 100%

Question

Quizplus · Accepted Answer

The range from 15,128 to 16,132 cups is within two standard deviations from the mean (15,630 ± 2*251), which covers approximately 95% of a normal distribution.

The Hourly Production of a Plastic Cup Company Is Tracked