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ECN 221 ASU EXAM -1 QUESTIONS WITH COMPLETE SOLUTION GRADED A+
Question : which of the following is a measure of
dispersion?
CORRECT ANSWER: interquartile range
Question : the sum of deviations of the individual data
elements from their mean is_____.
CORRECT ANSWER: always equal to zero
Question : 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
Question : the interquartile range is_________.
CORRECT ANSWER: the difference between the third
and first quartiles
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