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## Mean Median Mode Range

#### Introduction

#### Terms

**Mean**- The mean is defined as the sum of all values divided by the number of values. Also known as Average

**Median**- The median is the middle value in a list when values are sorted.

**Mode**- The mode is the number which appears most frequently.

**Range**- The range is the difference between the highest and lowest values.

## Examples

[object Object]#### Find The Mean

Find the mean

To find the mean, first add all the numbers together:

There are five numbers in the list so we divide by five:

The mean of the set is 3

#### Find the Median

Find the median of the dataset

Right now the numbers are out of order, so it is difficult to tell which number will be in the middle of the list. So first put the numbers in order:

We can see that 5 is in the middle of the list. There are two numbers less than 5, and two numbers greater than 5.

The median of this set is 5

#### Find the Mode

Find the mode of the dataset

Right now the numbers are out of order, so it is difficult to tell which number appears most often. So first put the numbers in order:

The number that appears most often is 4, so 4 is the mode of the set

#### Find the Range

Find the range of the data set

Right now the numbers are out of order, so it is difficult to tell which number is the largest or the smallest. So first put the numbers in order:

Now it is easier to see that the smallest number in the list is 1 and the largest number is 20

To find the range, subtract 1 from 20:

The range of the set is 19