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← 3.1 Statistics I

Class limits, boundaries, width and midpoint

Mathematics · Grade 10 · about 40 minutes

The four numbers that describe a class, why boundaries sit half a unit outside the stated limits, and why it matters.

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  • 6 sections of explanation, worked examples and diagrams
  • 1 practice task with hints and worked answers
  • A quiz that marks itself as you go
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Other lessons in this sub-strand

  1. What statistics is
  2. Primary and secondary data
  3. Methods of collecting data
  4. Types of data
  5. A frequency table for ungrouped data
  6. Mode and median of ungrouped data
  7. Mean of ungrouped data
  8. Mean from a frequency table
  9. Grouping data into classes
  10. Class limits, boundaries, width and midpoint
  11. Modal class and the mean of grouped data
  12. Median of grouped data
  13. Histograms with equal class widths
  14. Histograms with unequal class widths
  15. Frequency polygons
  16. Interpreting data, and the statistics project