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Quartile Formula for Grouped Data
First quartile:
$$Q_1=l+\left(\frac{\frac{N}{4}-CF}{f}\right)h$$
Third quartile:
$$Q_3=l+\left(\frac{\frac{3N}{4}-CF}{f}\right)h$$
Usage
- Used to find quartiles directly from grouped continuous data.
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Quartile Formula for Grouped Data
First quartile:
$$Q_1=l+\left(\frac{\frac{N}{4}-CF}{f}\right)h$$
Third quartile:
$$Q_3=l+\left(\frac{\frac{3N}{4}-CF}{f}\right)h$$
Usage
- Used to find quartiles directly from grouped continuous data.
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