A New Machine Is Set or Calibrated to Fill Tubes

Multiple Choice

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then, once the machine is running, a sample of six tubes is taken every three hours and weighed with the following results: What is the range of the samples at 4 pm?

A) 0.05
B) 0.06
C) 0.11
D) 0.12