- Always check totals - frequency column should add up to total number of data values
- Use tally marks correctly - groups of 5 with the 5th mark crossing the first 4
- Choose appropriate class widths - usually 5, 10, or another round number
- Be careful with inequalities - understand ≤ and < symbols for grouped data
- Label clearly - include units and clear headings
- Modal class vs mode - modal class is a range, mode is a single value
- Show working - especially when calculating from frequency tables
This exam tips covers Exam Tips for 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 6 of 8 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.
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.