Core Statistics Skills GCSE Statistics Worksheets, Questions and Revision

The number of goals scored by a football team in 9 matches was: 1, 3, 2, 5, 3, 2, 3, 4, 1. Find the mean, median, mode and range.

1. Order the data: 1, 1, 2, 2, 3, 3, 3, 4, 5.
2. Mean: add the values (1+3+2+5+3+2+3+4+1 = 24) and divide by 9, giving 24/9 = 2.67 (2 dp).
3. Median: with 9 values, the middle one is the 5th value in the ordered list, which is 3.
4. Mode: 3 appears three times, more than any other value, so the mode is 3.
5. Range: largest value (5) minus smallest value (1) = 4.
6. Final answer: mean = 2.67, median = 3, mode = 3, range = 4.