Learning objectives
Collect, organise, display and interpret information.
By the end of this course, you should be able to explain the key ideas, use the methods and answer practice questions.
Lesson notes
Tables and charts
Tables organise information in rows and columns. Bar charts compare categories using bars.
Line graphs
Line graphs show how values change, often over time.
Mean
Mean = total of the values ÷ number of values. For 2, 4 and 6, the mean is 12 ÷ 3 = 4.
Median
The median is the middle value after ordering the data.
Mode and range
The mode is the most frequent value. The range is the largest value minus the smallest.
Worked example
For 3, 5 and 7, the mean is (3 + 5 + 7) ÷ 3 = 5.
Practice quiz
Enter an answer for each question. Then select Check answers. For fractions, use forms such as 1/2.