If the data `x_(1), x_(2) ... x_(10)` is such that mean of first four of these '11' the mean of remain six is 16 and sum of squares of all these is 2000 then standard deviation of the data is

If the data x_(1) x_(2) ... ... x_(0) is such that mean of first four of these '11' the mean of remain six is 16 and sum of squares of all these is 2000 then standard deviation of the data is 2sqrt(2) 2 4

Calculate mean and standard deviation from the following data:

If mean of squares of deviations of a set of n observations about - 2 and 2 are 18 and 10 respectively,then standard deviation of this set of observations is

If the mean of 100 observations is 50 and their standard deviations is 5,than the sum of all squares of all the observations is

If the mean of 50 observation is 25 and their standard deviation is 4 and the sum of the squares of all the observations is lambda , then (lambda)/(1000) is

The mean deviation of the data 3, 10, 10, 4, 7, 10, 5 is