The mean is described as:
a. the average of a population.
b. a cause of variation that is small in magnitude and difficult to identify; also called random or common cause.
c. the middle number in an ordered distribution, or the value that divides a series of ordered observations so that an equal distribution of numbers exists above and below.
d. most frequent measure in a distribution, or the value that occurs with the greatest frequency in the data.
Answer: A
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