________ is a statistical technique used to isolate the individual effects of a number of factors on a single outcome

Alchemy was the attempt to discover a process by which base metals, such as lead, could be turned into gold. If an alchemist had been successful,

A) all the lead in the world would have been added to the world's gold supply. B) all the lead in the world would have replaced the world's gold supply. C) all the lead in the world would only have been added to the world's gold supply when it was converted to gold. D) the alchemist would likely have been killed by the owners of real gold.

Price elasticity of demand is the:

A. change in the quantity demanded of a good divided by the change in the price of that good. B. percentage change in price of that good divided by the percentage change in the quantity demanded of that good. C. change in the price of a good divided by the change in the quantity demanded of that good. D. percentage change in quantity demanded of a good divided by the percentage change in the price of that good.