alleryMean deviation about the mean is described as not very:
AConvenient
BEconomical
CScientific
DSystematic
Answer & Solution
Correct answer: C. Scientific
1. Deviations from the median sum to less than those from the mean.
2. That makes the mean a weaker reference point.
3. So mean deviation about the mean is not very scientific.
_Source: syllabus Mathematics, Chapter 15, Statistics._
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