SSC (English Medium) Class 9Maharashtra State Board

View all notifications

Measures of Central Tendency

Create free account

      Forgot password?


  • Mean , Median , Mode
  • Quartile , Inter quartile


The three measures of central tendency for ungrouped data are : 
The mean (or average) of a number of observations is the sum of the values of all the observations divided by the total number of observations.
So, `bar x =
(sum_(i=1)^n x_i)/ n`.

For an ungrouped frequency distribution, it is `bar x = (sum_(i=1)^n f_ix_i)/(sum_(i=1)^n f_i)`

The median is that value of the given number of observations, which divides it into exactly two parts. 
If n is an odd number, the median = value of the `((n + 1)/2)^(th)` observation.
If n is an even number, median = Mean of the values of the `(n/2)^(th)` and `(n/2 + 1)^(th)` observation.

The mode is that value of the observation which occurs most frequently, i.e., an observation with the maximum frequency is called the mode. | Measures of Central Tendency

Next video

Measures of Central Tendency [00:13:56]
Series 1: playing of 1

View in app×