Question

1. Calculate Arithmetic Mean.
Salaries Rs. 1,500 1,250 1,750 1,800 1,700
2,000 1,000 2,250 2,500 1,650​

Answer 1

Answer:

1,740 is your answer

hope it helps you

Answer 2

Answer

first arrange this data in increasing form:

1000, 1250 , 1500,1650 ,1700, 1750, 1800 ,2000, 2250, 2500

.......................

now ,1740 will be answer

More Information

Before the discussion of arithmetic mean, we shall introduce certain notations. It will be assumed that there are n observations whose values are denoted by X1,X2, ..... Xn respectively. The sum of these observations X1 + X2 + ..... + Xn will be denoted in abbreviated form as

sum of these observations

where S (called sigma) denotes summation sign.

The subscript of X, i.e., 'i' is a positive integer, which indicates the serial number of the observation. Since there are n observations, variation in i will be from 1 to n. This is indicated by writing it below and above S, as written earlier. When there is no ambiguity in range of summation, this indication can be skipped and we may simply write X1 + X2 + ..... + Xn = SXi.

Arithmetic Mean is defined as the sum of observations divided by the number of observations. It can be computed in two ways:

• Simple arithmetic mean and
• weighted arithmetic mean.

In case of simple arithmetic mean, equal importance is given to all the observations while in weighted arithmetic mean, the importance given to various observations is not same.