Subject: Mathematics

Topic: Mean, Median, Mode and Range of Data

Class: JS3

1. Mean (Average)

The mean is the sum of all the values in a data set divided by the number of values.

Example:

Data: 2, 4, 6, 8, 10

Mean = (2 + 4 + 6 + 8 + 10) ÷ 5

Mean = 30 ÷ 5 = 6

2. Median

The median is the middle value when the data are arranged in order.

Example:

Data: 2, 4, 6, 8, 10

The middle number is 6.

Therefore, the median = 6.

3. Mode

The mode is the value that occurs most frequently in a data set.

Example:

Data: 2, 4, 4, 6, 8

The number 4 appears twice, more than any other number.

Therefore, the mode = 4.

4. Range

The range is the difference between the largest and smallest values in a data set.

Example:

Data: 2, 4, 6, 8, 10

Range = Largest value − Smallest value

Range = 10 − 2 = 8

Summary

Mean (Average of the data)

Median (Middle value in ordered data)

Mode (Most frequent value)

Range (Difference between highest and lowest values)

Lesson Notes Library