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0 votes
51.5k views
in Descriptive Statistics and Probability by (47.4k points)
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If Q1 = 30 and Q3 = 50, the coefficient of quartile deviation is: 

(a) 20 

(b) 40 

(c) 10 

(d) 0.25

1 Answer

+1 vote
by (47.8k points)
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Best answer

(d) 0.25

Coefficient of quartile deviation is = \(\frac{Q_3-Q_1}{Q_3+Q_1}\)

\(\frac{50-30}{50+30}=\frac{20}{40}\)

= 0.25

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