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studyStatistics & Probability
FoundationMaths revision

Mean, Median, and Mode

Choose and calculate measures of centre while recognising the effect of outliers.

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Focus points
✓Calculate mean, median and mode.
✓Compare measures of centre.
✓Reason about missing values.
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Question lineup

Try each question first, reveal a hint when you need one, then check the worked answer. Mark them done as you go — finish the set to claim your chips.

8 revision questions
Question 1FluencyCore
Original practice · Free Online Revision
Skill · mean
Find the mean of 6, 9, 11, 14, 20.
Question 2FluencyCore
Original practice · Free Online Revision
Skill · median
Find the median of 4, 7, 9, 12, 15, 18.
Question 3FluencyCore
Original practice · Free Online Revision
Skill · mode
Find the mode of 3, 4, 4, 5, 7, 7, 7, 9.
Question 4FluencyCore
Original practice · Free Online Revision
Skill · missing value
The mean of five numbers is 18. Four are 12,17,20,21. Find the fifth.
Question 5ReasoningCore
Original practice · Free Online Revision
Skill · outlier reasoning
The data 4,5,5,6,40 contains an outlier. Compare mean and median.
Question 6ApplicationCore
Original practice · Free Online Revision
Skill · mean application
A class mean rises from 68 to 69 after one new score of 85 is added. Originally there were 16 students. Verify the claim.
Question 7ReasoningCore
Original practice · Free Online Revision
Skill · conceptual reasoning
Can a data set have two modes? Give an example.
Question 8ChallengeStretch
Original practice · Free Online Revision
Skill · constructing data
Six numbers have mean 10 and median 9. Construct one possible ordered data set with positive integers.