Histograms & frequency density
Edexcel GCSE Maths revision on Histograms & frequency density. Aligned to the Pearson Edexcel GCSE Mathematics 1MA1 specification. This bank has 16 practice questions on this topic.
Sample questions (3 of 16)
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Question 1
What does the area of a bar in a histogram represent?
- A) The frequency of the data group
- B) The class width of the data group
- C) The height of the data class bin
- D) The mean value of the data unit
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Answer: The frequency of the data group
The correct answer is the frequency of the data group. In a histogram, the area of each bar is calculated by multiplying the frequency density by the class width, which equals the total frequency for that interval.
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Question 2
If a bar has a frequency density of 4 and a class width of 5, what is the frequency of that group?
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Answer: 20
The frequency is 20. You find this by multiplying the frequency density (4) by the class width (5).
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Question 3
Which axis on a histogram should always represent the frequency density?
- A) The vertical axis
- B) The horizontal axis
- C) The diagonal axis
- D) The secondary axis
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Answer: The vertical axis
The vertical axis (y-axis) represents the frequency density. The horizontal axis (x-axis) represents the continuous data variable being grouped.
Want to test yourself on the remaining cards for this topic?
13 more questions on Histograms & frequency density — plus mistakes tracking and spaced repetition across the whole Maths spec.