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Question
Correlation co-efficient lies between
Options
0 to ∞
–1 to +1
–1 to 0
–1 to ∞
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Solution
–1 to +1
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Calculate the coefficient of correlation for the ages of husbands and their respective wives:
| Age of husbands | 23 | 27 | 28 | 29 | 30 | 31 | 33 | 35 | 36 | 39 |
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| Arithmetic mean | 25 | 18 |
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