nisha.welb
What is the standard deviation of the following data set?
11, 13, 15, 16, 20, 21



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ravi623
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how do we calculate it?

nisha.welb
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i dont know

ravi623
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really?

nisha.welb
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nevermind its A.

ravi623
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A means 11

nisha.welb
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square root 9.5

ravi623
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ok