Statistics.
Collect and organise data, read numerical displays, calculate summaries and make fair evidence-based comparisons.
Work through the topic
Learn the method, follow the examples, then try the worksheet.
- 01
Discrete and continuous data
Distinguish numerical counts from measurements, and recognise when numbers are only labels.
- 02
Collecting data and writing a statistical question
Write a focused question with variable answers, then collect data consistently and fairly.
- 03
Frequency tables and suitable graphs
Organise observations into a complete frequency table and select a display that matches the data.
- 04
Dot plots and stem-and-leaf plots
Build and read dot plots and ordered stem-and-leaf plots without losing repeated values.
- 05
Mean, median, mode and range
Calculate and interpret measures of centre and spread, including repeated values and even-sized datasets.
- 06
Shape and outliers
Describe distribution shape and unusual observations, explaining why outliers need checking rather than automatic removal.
- 07
Comparing displays and choosing a useful average
Compare groups using suitable displays and measures rather than relying on one average or a misleading picture.
- 08
A complete small investigation and report
Follow a small statistical investigation from a clear question to an evidence-based conclusion with limitations.
Topic review
Revisit the key ideas, then choose a practice paper.