Obtain the sum of the deviations of the observations
3,4,6,8,14 from their mean.

The mean and standard deviation of a group of 100 observations were found to be 20 and 3, respectively. Later on it was found that three observations were incorrect, which were recorded as 21, 21 and 18. Find the mean and standard deviation if the incorrect observations are omitted.

Find the mean of 25, 27, 19, 29, 21, 23, 25, 30, 28, 20 and prove that the sum of the deviation taken from the mean is zero.

True/false If the mean of 5 observation x,x+2,x+4,x+6,x+8 is 11, then the mean of first three observations is 8.

Find the mean and standard deviation of the probability distribution of the number obtained when a card is drawn at random from a set of 7 cards numbered 1 to 7.

The mean of 5 observation is 4.4 and their variance is 8.24 . If three of the observations are 1,2 and 6, find the other two observations

If the mean of the observations : x, x + 3, x + 5, x + 7, x + 10 is 9, the mean of the last three observations is

Find the mean deviation from the mean for the following data :

Find the mean deviation from the mean for the following data :

Find the mean deviation from the mean for the following data :