Cambridge Secondary (7-9). Stage 9. Science. Learner's Book - Unit 7: Genes and inheritance - Question 36

Measuring variation in humans: investigate wrist circumference. Think how you can fit the measurements into different categories. Each category should have the same range of measurements. You may need different categories from this example. Put one mark in the Tally column for each measurement in that category, then add the tally strokes and complete the last column.

| Wrist circumference in cm | Tally | Number of people |
|---|---|---|
|8.0–8.9| | |
|9.0–9.9| | |
|10.0–10.9| | |
|11.0–11.9| | |
|12.0–12.9| | |
|13.0–13.9| | |
|14.0–14.9| | |