Quartile Positions for Ungrouped Data

Quartile Positions for Ungrouped Data

For $$n$$ ordered observations:

$$Q_1=\text{value at position }\frac{n+1}{4}$$

$$Q_2=\text{value at position }\frac{n+1}{2}$$

$$Q_3=\text{value at position }\frac{3(n+1)}{4}$$

Usage

- Used to locate quartiles in an ungrouped dataset.

For $$n$$ ordered observations:

$$Q_1=\text{value at position }\frac{n+1}{4}$$

$$Q_2=\text{value at position }\frac{n+1}{2}$$

$$Q_3=\text{value at position }\frac{3(n+1)}{4}$$

Usage

- Used to locate quartiles in an ungrouped dataset.