If all the scores in a distribution are expressed in terms of their deviation from a measure of central tendency, the sum of the positive deviations will exactly equal the sum of the negative deviations taken about
a. the median.
b. the mean.
c. the mode.
d. All of the above are correct if the distribution is symmetrical and unimodal.
e. All of the above are correct for any distribution.
Ans: d
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