Find the arithmetic mean of:

Find the arithmetic means of first 6 natural numbers.

Find the arithmetic means of first 6 natural numbers.

Find the arithmetic mean from the following distribution. :

Find the arithmetic mean by (a) assumed mean and (b) step deviation mthods.

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

The coefficient of variation for a distribution is 60 and standard deviation is 21. Find the arithmetic mean.

In a study of patients, following data are obtained. Find the arithmetic mean and the standard deviation of the, data :

Following is the distribution of the number of out-door patients registered in a certain hospital in 100 days : Find the arithmetic mean and standard deviation.