Two coffee-vending machines are studied to determine whether they distribute the same amounts. Samples are taken and the number of ounces is recorded for each machine. 
What is the appropriate null hypothesis for the claim that they distribute the same amount of coffee?
Definitions:
Price Coefficient
A numerical value that represents the degree to which price affects demand or supply for a good or service.
Primary Copper
Copper in its metallic form as found in nature, typically extracted via mining and used as a raw material for further refinement and use in various applications.
Supply Curves
depict how the quantity supplied of a commodity varies as its price changes, assuming other factors remain constant.
Price Elasticity of Demand
An assessment of the variation in the amount of a product desired in relation to fluctuations in its cost.
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