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 7 am?
Definitions:
Economic Efficiency
A state where all resources in an economy are optimally allocated to serve each individual or entity in the best way while minimizing waste and inefficiency.
Transaction Cost
Expenses incurred when buying or selling goods or services, including fees, taxes, and other charges.
Externality Problem
A situation in which a third party is affected by the consequences of a transaction or activity between others, either positively or negatively.
Private Contract
An agreement between private parties that creates mutual obligations enforceable by law.
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