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Comparing series measured in different units needs a measure independent of:
ASizes
BSlopes
CUnits
DSigns
Answer & Solution
Correct answer: C. Units
1. The two series may be measured on different scales.
2. We require a measure which is independent of the units.
3. So the correct answer is units.
_Source: NCERT Class 11 Mathematics, Ch 15 'Statistics'_
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