The sample mean and sample variance of five data values are, respectively 13.6 and 25.8. If three of the data values are 7, 13 and 20, what are the other two data values?

The mean and variance of five observations are 6 and 4 respectively.If three of these are 5,7 and 9, find the other two observations.

Variance of the data 2,4,6,8,10 is

Variance of the data 2,4,6,8,10 is

The mean and the standard deviation of a data of 8 items are 25 and 5 respectively. If two terms 15 and 25 are added to this data, then the variance of the new data is

The mean of five observations is 5 and their variance is 9.20. If three of the given five observations are 1,3 and 8, then a ratio of other two observations is

The mean and variance of 5,7,12,10,15,14,a,b are 10 and 13.5 respectively then value of |a-b|=

The mean and variance of a data set comprising 15 observations are 15 and 5 respectively. If one of the observation 15 is deleted and two new observations 6 and 8 are added to the data, then the new variance of resulting data is