How AM, GM and HM of the values of a variable are changed when the values are divided by a constant .

If the values of a variable be increased by 10, show the effect on arithmetic mean.

Find the median of the values of the variable given in the question number 10 in the exercise -1.

How is the mean life of a given radiaoactive nucleus related to the decay constant ?

The arithmetic mean of 200 values of a variable is 50. Later on, it is found that two values 92 and 8 have been taken wrongly instead of 192 and 88 respectively . After correction , find the actual arithmetic mean of the given values.

If arithmetic mean and coefficient of variation of a variable x are 10 and 50% respectively, find Var (5 - 2x).

Find the arithmetic mean and median for first n natural numbers.

The first moment about the value 4 of a variable is 3, then its mean is

If n arithmetic means are inserted between 2 and 38, then the sum of the resulting series is obtained as 200. Then find the value of ndot

Find the arithmetic mean of first n event natural numbers.