Edexcel GCSE Statistics · 1ST0
Specification 2c.01, 2c.04, 2c.05 · Paper 1, Paper 2
Revise: Calculating measures of spreadThe usual interdecile range is therefore the ninth decile minus the first decile, giving the same 5.13-minute estimate here. If different deciles or percentiles are specified, subtract those particular boundary values.
- Revise: Comparing measures of spread
The difference between two specified decile values. The first-to-ninth interdecile range is the 90th percentile minus the 10th percentile.