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Dear Student,

Please refer the following question for answer to similar query

https://www.meritnation.com/ask-answer/question/find-the-mean-and-variance-for-the-following-frequency-dist/statistics/6301318

$$\begin{gathered} For s\tan dard deviation find the value of \sigma \\ \sigma =\sqrt{ {\sigma }^2}=\sqrt{variance} \\ =\sqrt{132}=11.489 \end{gathered}$$


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