The variance of observations `8, 12, 13, 15, 22,` is

The variance of the observations 2,3,5,7,11,13,17,22 is

Find the mean, the median and the mode of the observations 24, 12, 15, 28, 15, 22, 17.

Find the median of the observations 13, 9, 15, 8, 6, 3.

The variance of 15 observations is 8. If each observation is multiplied by 4, then the variance of new observation is ……

The mean and variance of 8 observations are 10 and 13.5 respectively . If 6 of these observations are 5,7,10,12,14,15 , then the absolute difference of the remaining two observations is :

Calculate the variance and standard deviation of the observations : 11, 12, 13, . . . .. 20.

The mean and variance of 7 observations are 7 and 22 respectively. If 5 of the observations are 2, 4, 10, 12, 14, then the remaining 2 observations are

The mean and variance of 7 observations are 7 and 22 respectively. If 5 of the observations are 2, 4, 10, 12, 14, then the remaining 2 observations are

The variance of 15 observations is 4. If each observations increased by 9 find the variance of the resulting observations.