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Over the range of positive, but diminishing, marginal returns for an input, the total product curve
Cumulative Frequency
The sum of a class and all classes below it in a frequency distribution.
Frequency Polygon
A graphical representation of the distribution of a dataset that shows the frequency of data points within certain intervals.
Variation
A term describing the extent to which data points in a dataset differ from each other and from the mean.
Class Interval
A fixed range of values, used in the creation of a frequency distribution.
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