Coefficient of quartile deviation is calculated by the formula
A. $$\frac{{{{\text{Q}}_2} + {{\text{Q}}_1}}}{4}$$
B. $$\frac{{{{\text{Q}}_3} + {{\text{Q}}_1}}}{2}$$
C. $$\frac{{{{\text{Q}}_3} + {{\text{Q}}_1}}}{{{{\text{Q}}_3} + {{\text{Q}}_1}}}$$
D. $$\frac{{{{\text{Q}}_2} + {{\text{Q}}_1}}}{{{{\text{Q}}_3} - {{\text{Q}}_1}}}$$
Answer: Option C
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