alleryIf r = +1, the correlation is
AWeak positive
BPerfect negative
CPerfect positive
DNo correlation
Answer & Solution
Correct answer: C. Perfect positive
1. The value of r measures linear association.
2. r = +1 implies all points lie exactly on a line with positive slope.
3. This is called perfect positive correlation.
4. So the answer is 'perfect positive'.
_Source: ICAI BoS Foundation Paper 3, Ch 17 'Correlation', p.5_
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