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Which of the following statements about the arithmetic mean is least accurate? A. The arithmetic mean of a frequency distribution is equal to the sum of the class frequency times the midpoint of the frequency class all divided by the number of observations. B. The arithmetic mean is the only measure of central tendency where the sum of the deviations of each observation from the mean is always zero. C. If the distribution is skewed to the left then the mean will be greater than the median. |