Statistics › Section A · Sampling and data › Topic A.3
Frequency and relative frequency tables
Before any graph or average, raw data usually get organised into a table of counts. This topic builds frequency tables step by step and turns them into the proportions and running totals that answer real questions.
In this topic
- Counting first: frequency
- Frequency tables for categorical data
- Relative frequency
- Why percentages beat raw counts
- Cumulative relative frequency
- Grouped tables for measured data
- Worked example: hold times
- Worked example: reading the table
- Common mistakes to avoid
- Key takeaways
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