By Law, a Box of Cereal Labeled as Containing 20

Multiple Choice

By law, a box of cereal labeled as containing 20 ounces must contain at least 20 ounces of cereal. The machine filling the boxes produces a distribution of fill weights with a mean equal to the
Setting on the machine and with a standard deviation equal to 0.04 ounce. To ensure that most of
The boxes contain at least 20 ounces, the machine is set so that the mean fill per box is 20.12 ounces.
Assuming nothing is known about the shape of the distribution, what can be said about the
Proportion of cereal boxes that contain less than 20 ounces.

A) The proportion is at most 11%.
B) The proportion is less than 2.5%.
C) The proportion is at most 5.5%.
D) The proportion is at least 89%.