Histograms and area keys (AQA GCSE Statistics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
How do you find the frequency from an area key?
How do you find the frequency from an area key?
Count squares and multiply by key value
Why is an area key useful for complex histograms?
Why is an area key useful for complex histograms?
Eliminates manual density calculations
What systematic step should you follow when using an area key?
What systematic step should you follow when using an area key?
Count squares and multiply by key
What is true about the relationship between area and frequency?
What is true about the relationship between area and frequency?
Area proportional to frequency
How do you handle class intervals with unequal widths in histograms?
How do you handle class intervals with unequal widths in histograms?
Use area keys to find frequency
Class 10 < t ≤ 40 has width 30. Frequency density = 0.2. Frequency equals?
Class 10 < t ≤ 40 has width 30. Frequency density = 0.2. Frequency equals?
6 people
Area key: 1 square = 2 fish. Bar covers 45 squares. Frequency?
Area key: 1 square = 2 fish. Bar covers 45 squares. Frequency?
90
Class 80 < t ≤ 100 has density 0.4 and width 20. Frequency?
Class 80 < t ≤ 100 has density 0.4 and width 20. Frequency?
8
Area key: 1 square = 3 pupils. A bar covers 28 small squares. Frequency = ?
Area key: 1 square = 3 pupils. A bar covers 28 small squares. Frequency = ?
84 pupils
Class interval 30 < x ≤ 55 has frequency density 0.8. Find the frequency.
Class interval 30 < x ≤ 55 has frequency density 0.8. Find the frequency.
20