Handling Data 6
2 marks · NormalA grouped frequency table shows the lengths of sticks (in cm), grouped as follows:
| Length (cm) | Frequency |
|---|---|
| 10 < l \leq 15 | 5 |
| 15 < l \leq 20 | 8 |
| 20 < l \leq 25 | 7 |
What does the area of each bar in a histogram drawn for this data represent?
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The frequency for each group (or class interval).
Also accept: It represents the frequency of values in that interval.; The total number of data points in the interval.
Common mistakes: Saying the height is the frequency (height is frequency density, not frequency).
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Marking points
B1 · 2 marks · States correctly that the area of each bar represents the frequency.
Worked solution
In a histogram, the area of each bar represents the frequency for that interval.