Bar Charts:
- ā Unequal bar widths: Makes comparison difficult
- ā Not starting at zero: Can make differences look bigger than they are
- ā Missing labels: Chart becomes unclear without proper labels
- ā Inappropriate scale: Too large or too small for the data
Pictograms:
- ā No key: Essential for understanding the data
- ā Inconsistent symbol size: Larger symbols suggest larger values incorrectly
- ā Poor symbol choice: Unrelated or unclear symbols
- ā Inaccurate partial symbols: Estimating fractions instead of calculating precisely
This deep dive covers Common Mistakes to Avoid within Bar Charts & Pictograms for GCSE Mathematics. Revise Bar Charts & Pictograms in Statistics for GCSE Mathematics with 11 exam-style questions and 20 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 9 of 11 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
Practice questions for Bar Charts & Pictograms
In a pictogram, the key shows that one symbol represents 4 people. A row shows 3 and a half symbols. How many people does this row represent?
A dual bar chart shows the test scores of boys and girls in three subjects: - Maths: Boys = 65, Girls = 72 - English: Boys = 58, Girls = 70 - Science: Boys = 71, Girls = 68 In which subject is the difference between boys' and girls' scores the greatest?