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)
