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A histogram shows the heights of 30 plants: Which group holds the most plants?
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A histogram shows the heights of 30 plants:
| Height | Plants |
|---|---|
| 0 cm up to 10 cm | 3 |
| 10 cm up to 20 cm | 7 |
| 20 cm up to 30 cm | 11 |
| 30 cm up to 40 cm | 6 |
| 40 cm up to 50 cm | 3 |
- Which group holds the most plants?
- How many plants are 20 cm or taller?
- How many are shorter than 20 cm?
- What percentage of the plants are 30 cm or taller?
Need a reminder? The key ideaShow
A histogram shows numbers put in groups of equal width. The bars touch, and the height of a bar is the number of values in its group. A line graph joins values over time.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. The tallest bar. 20 cm up to 30 cm, with plants.
Step 2. 20 cm or taller. plants.
Step 3. Shorter than 20 cm. plants. Check: .
Step 4. 30 cm or taller. plants, and .
Answer: 20 cm up to 30 cm; plants; plants; .
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