Lesson 2a.06

2a.06 Recognise where errors in construction lead to graphical misrepresentation, including... Quiz: Pearson Edexcel Statistics, Unit 2

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 2a.06, Recognise where errors in construction lead to graphical misrepresentation, including...: 20 multiple choice questions for the Pearson Edexcel GCSE Statistics (1ST0), Unit 2: Processing, representing and analysing data, written with Revision Ninja.

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The 20 questions

  1. What graphical error occurs when a vertical axis does not start at zero?

    • Broken scale
    • Truncated axis
    • Omitted origin
    • False baseline

  2. Which feature of a 3D bar chart most often misleads readers?

    • Missing labels
    • Perspective distortion
    • Unequal widths
    • Bright colours

  3. Where should the bar edges sit in a histogram for grouped continuous data?

    • Class midpoints
    • Arbitrary intervals
    • Upper limits only
    • True class boundaries

  4. A pictogram uses one symbol to represent 10 cars. A row shows 4 symbols. How many cars does the row represent?

    • 400 cars
    • 14 cars
    • 4 cars
    • 40 cars

  5. What construction error is shown when gridline values 0, 10, 20, 40, 80 are spaced equally?

    • Truncated axis
    • Missing data
    • Inverted scale
    • Non-linear scale

  6. If a bar chart vertical axis starts above zero, what is the visual effect on bar heights?

    • Inverted heights
    • True proportions
    • Zero baseline
    • Exaggerated ratios

  7. If a circle's radius doubles, how much larger does its area appear?

    • Eight times
    • Four times
    • Sixteen times
    • Two times

  8. Why might a line graph with a very narrow vertical scale mislead readers?

    • Exaggerates small changes
    • Hides major trends
    • Removes the gridlines
    • Reverses the data

  9. Why is plotting raw frequency as bar height misleading for histograms with unequal widths?

    • Classes overlap
    • Area ignores width
    • Scale becomes linear
    • Mean becomes zero

  10. Higher tier: a student finds frequency density for a class of width 20 with frequency 30 as 30 x 20. What is the correct frequency density?

    • 10
    • 0.67
    • 600
    • 1.5

  11. When is it acceptable to label a histogram's vertical axis simply as frequency?

    • Equal class widths
    • Continuous data only
    • Unequal class widths
    • Discrete data only

  12. Which correction best fixes a bar chart whose vertical axis starts above zero?

    • Change bar widths
    • Remove gridlines
    • Use 3D effect
    • Start axis at zero

  13. Which graph type validly permits a vertical scale that does not start at zero?

    • Line graph
    • Bar chart
    • Pie chart
    • Pictogram

  14. On a consistent scale, what height should a bar representing 30 be if a bar for 60 is 3 cm?

    • 1.0 cm
    • 1.5 cm
    • 2.0 cm
    • 2.5 cm

  15. What rule must every pictogram follow to avoid misrepresentation?

    • Symbols touching bars
    • Varying symbol sizes
    • No numerical key
    • Equal symbol value

  16. Higher tier: a class of width 5 has frequency density 4. What is its frequency?

    • 20
    • 1.25
    • 0.8
    • 9

  17. If two histogram bars have a frequency density of 2, what must be true about them?

    • Equal frequency
    • Equal bar height
    • Equal total area
    • Equal class width

  18. Why should chart axes always be labelled with units?

    • Identifies measured values
    • Removes data bias
    • Creates class intervals
    • Increases total data

  19. What graphical distortion occurs when pie chart sectors sum to more than 360 degrees?

    • Truncated scale
    • Inverted axes
    • Overstated proportions
    • Negative values

  20. What graphical error causes readers to misjudge bar sizes?

    • Monochrome shading
    • Equal bar widths
    • Labelled axes
    • Hidden baseline

All Pearson Edexcel Statistics quizzes