Find the standard deviation for the following data:

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answer is 6.77.

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Detailed Solution

N=30,∑i=17 fixi=420,∑i=17 fixi−x¯2=1374 Therefore, x¯=∑i=17 fixiN=130×420=14 Hence, variance σ2=1N∑i=17 fixi−x¯2=130×1374=45.8 and Standard deviation (σ)=45.8=6.77

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