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प्रश्न
If the mean and coefficient of variation of a data are 15 and 48 respectively, then find the value of standard deviation.
उत्तर
Mean `(barx)` = 15
Coefficient of variation = 48
`sigma/(barx) xx 100` = 48
⇒`sigma/15 xx 100` = 48
σ × 100 = 48 × 15
σ = `(48 xx 15)/100`
= `720/100`
= 7.2
Standard deviation (σ) = 7.2
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