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Card 18 / 21:
Mean
a number that measures the central tendency; a common name for mean is ‘average.’ The term ‘mean’ is a shortened form of ‘arithmetic mean.’ By definition, the mean for a sample (detonated by x ¯ ) is x ¯ = Sum of all values in the sample Number of values in the sample and the mean for a population (denoted by μ ) is μ = Sum of all values in the population Number of values in the population .
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