Statistics: Mean and Range
Statistics involves collecting, organising, and interpreting data. The mean (average) and range help summarise a set of data.
What You Need to Know
Key Concept Diagram
The mean is found by adding all values then dividing by the number of values
The range is the difference between the highest and lowest values
A larger range means the data is more spread out
Statistics help us understand and compare groups of data
Key Vocabulary
Mean
The average, found by dividing the sum of all values by the number of values
Range
The difference between the highest and lowest values in a data set
Data set
A collection of numbers or information gathered for analysis
Sum
The total when all values are added together
Knowledge Check
Select the correct answer for each question. Click "Check Answer" to see if you are right.
Question 1
Find the mean of: 4, 6, 8, 10.
Question 2
Find the range of: 3, 9, 5, 7, 1.
Question 3
Five students scored: 10, 8, 6, 10, 6. What is the mean score?
Key Concepts Summary
- ●The mean is found by adding all values then dividing by the number of values
- ●The range is the difference between the highest and lowest values
- ●A larger range means the data is more spread out
- ●Statistics help us understand and compare groups of data