Central tendency is a comprehensive overview of a given set of data. That describes the central value for all population. So we can get pictures of the population instead of studying at entire data points. There are three common measure

They

## Mean

Mean is the sum of all data points is

mean denoted by

For example:

(5 + 20 + 6 + 1 + 19 + 9) / 6 = 10

As the mean use all value of dataset for

## Median

Median is the center or middle of given data points. So rearrange the data points in order and find the middle value of it. If have 9 data points then we divide 4 data point each side and get median value.

For example:

– 1 56 5 8 0 12 7 3 4

Step 1: Arrange in order

– 0 1 3 4 5 7 8 12 56

Step 2: find the middle value

– so, the median is 5.

For the odd number of data

For example, we add 2 in our previous example

– 1 56 5 8 0 12 7 3 4 2

Step 1: Arrange in order

– 0 1 3 4 5 7 8 12 56

Step 2: find the average of the middle values

– here median is (5+7)/2 = 6

Thus the median is lightly affected by outliers and skewed data.

## Mode

The mode is the most common data point in a given dataset.

For example,

– 2 5 56 4 2 92 4 2 4 1 4

Here, mode is 4. As its repeat four times.

It can have one, many or no mode in the dataset. So it’s sometimes misleading to use as a measure when we have many modes.