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.
Key Facts About Frequency Tables
- 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
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.