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Calculate variance and standard deviation for the following distribution.

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Calculate variance and standard deviation for the following distribution.
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`therefore` Standard-Deviation `sigma_x=h/Nsqrt(NSigmaf_iy_i^2-(Sigmaf_iy_i)^2)`
`=5/60sqrt(60xx254-6^2)`
`=1/12sqrt(15240-36)`
`=(sqrt15204)/12=123.30/12=10.28`
`therefore` Variance `=sigma_x^2=(S.D.)^2`=105.60
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