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 6 tubes is taken every three hours and weighed with the following results: 
What is the upper control limit (UCL) for the mean?
Definitions:
Price Increase
A rise in the cost of goods or services over a specific period of time, which can affect purchasing power and economic stability.
Substitutes
Substitutes are goods or services that can be used in place of each other, fulfilling the same needs or desires of the consumer.
Price Inelastic
A situation where the demand or supply for a product does not change significantly when its price changes.
Good X
A placeholder term used in economics to represent a specific product or commodity in theoretical discussions.
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