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Describe how and why you would use counterbalancing in examining the effects of color on heart rate.
Quartile
A statistical term describing each of four equal groups into which a population can be divided based on a particular variable.
Annual Family Income
The total amount of money earned by all members of a family within one year.
Income Distribution
The way in which total income is shared amongst the members of a society, often analyzed to understand the extent of economic inequality.
Before-Tax Income
The total income earned by an individual or corporation before taxes have been deducted.
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