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[" If the mean of "50" observations is "...

[" If the mean of "50" observations is "25" and their standard deviation is "4" and the sum of the "],[" squares of all the observations is "lambda" ,then "(lambda)/(10n0)" is "]

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The mean of 100 observations is 50 and their standard deviation is 5. The sum of all squares of all the observations is ………….

The mean of 100 observations is 50 and their standard deviation is 5. The sum of all squares of all the obsrervations is :