NORMAL DISTRIBUTION — Statistics STD 12 Commerce — Question
Gujarat BoardEnglish MediumSTD 12 CommerceStatisticsNORMAL DISTRIBUTION1 Mark
Question
The approximate value of mean deviation for a normal distribution is $8.$ Find its standard deviation.
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Answer
Here, mean deviation $=8$
In normal distribution, mean deviation $\approx \frac{4}{5} \sigma$
$\therefore 8 \approx \frac{4}{5} \sigma$
$ \therefore \sigma \approx \frac{8 \times 5}{4} \approx 10$
Hence, the standard deviation obtained is $10.$
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