Interpreting pie charts (Edexcel GCSE Statistics): Flashcards
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What do pie charts display?
What do pie charts display?
Qualitative data as parts of a whole, in categories.
What is the key principle of pie chart angles?
What is the key principle of pie chart angles?
Angles are directly proportional to the values they represent.
Sum of all angles in a pie chart?
Sum of all angles in a pie chart?
Exactly 360° in a complete circle.
Main formula for finding quantity from an angle?
Main formula for finding quantity from an angle?
(Angle/360) × Total quantity, for example, people.
How to find the number of people in Bath with a 128° sector?
How to find the number of people in Bath with a 128° sector?
(128/360) × 135 ≈ 48 people.
Find the angle for 15 people in a survey of 135?
Find the angle for 15 people in a survey of 135?
(15/135) × 360 = 40°.
How do you find missing angles in a pie chart?
How do you find missing angles in a pie chart?
Subtract known angles from 360° to find the unknown.
What should you do to check your pie chart angles?
What should you do to check your pie chart angles?
Ensure all angles sum to 360°.
Find people from 128° with total 135
Find people from 128° with total 135
48 people (128/360×135 = 48)
Find angle for 15 out of 135
Find angle for 15 out of 135
40° (15/135×360 = 40°)