- Frequency: How many times each value appears in the data
- Tally marks: A visual way to count frequencies (|||| = 5)
- Total frequency: The sum of all individual frequencies
- Modal class: The group with the highest frequency
- Grouped data: Data organized into ranges (classes) rather than individual values
- Class width: The size of each group interval
This key facts covers Key Facts About Frequency Tables within Frequency Tables for GCSE Mathematics. Revise Frequency Tables in Statistics for GCSE Mathematics with 11 exam-style questions and 20 flashcards. Use this page as part of a wider topic revision path rather than treating it as an isolated fact. It is section 2 of 8 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Practice questions for Frequency Tables
The table below shows the number of books read by students in a month: | Books read | Frequency | |---|---| | 0 | 4 | | 1 | 7 | | 2 | 11 | | 3 | 6 | | 4 | 2 | What is the mode?
Explain why the mean calculated from a grouped frequency table is described as an 'estimate' rather than an exact value.
Quick recall flashcards
What is class width?
Class width is the size of each interval in a grouped frequency table.
Example: In 10-19, 20-29, 30-39
Class width = 10
What is frequency?
Frequency is the number of times each value or category appears in a dataset. It shows how often something occurs.