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Diagram of sectors
In a survey amongst $15$ students on their favourite dessert, the obtained answers are:
Pudding, fruit, ice cream, yogurt, ice cream, cake, pudding, ice cream, yogurt, fruit, yogurt, cake, ice cream, ice cream, pudding.
Make a pie chart.
| Dessert | Absolute frequency $f_i$ | Angle |
| Pudding | $3$ | $3\cdot\dfrac{360}{15}=72^\circ$ |
| Fruit | $2$ | $2\cdot\dfrac{360}{15}=48^\circ$ |
| Ice cream | $5$ | $5\cdot\dfrac{360}{15}=120^\circ$ |
| Yogurt | $3$ | $3\cdot\dfrac{360}{15}=72^\circ$ |
| Cake | $2$ | $2\cdot\dfrac{360}{15}=48^\circ$ |