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which of the following is a measure of dispersion? - CORRECT ANSWER interquartile range the sum of deviations of the individual data elements from their mean is_____. - CORRECT ANSWER always equal to zero the value of the sum of the squared deviations form the mean, i.e., summation(x-xbar)^2 must always be______. - CORRECT ANSWER at least zero the interquartile range is_________. - CORRECT ANSWER the difference between the third and first quartiles ...

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