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 Problem: quartile deviation {1,2,3,2,3,6} [ Calculator, Method and examples ]Solution:Your problem -> quartile deviation {1,2,3,2,3,6}Quartile deviation :Arranging Observations in the ascending order, We get :1, 2, 2, 3, 3, 6Here, n = 6Q_1 = ((n+1)/4)^(th) value of the observation=(7/4)^(th) value of the observation=(1.75)^(th) value of the observation=1^(st) observation  + 0.75 [2^(nd) - 1^(st)]=1 + 0.75 [2 - 1]=1 + 0.75 (1)=1 + 0.75=1.75Q_3 = ((3(n+1))/4)^(th) value of the observation=((3*7)/4)^(th) value of the observation=(5.25)^(th) value of the observation=5^(th) observation  + 0.25 [6^(th) - 5^(th)]=3 + 0.25 [6 - 3]=3 + 0.25 (3)=3 + 0.75=3.75Inter Quartile range =Q_3 - Q_1=3.75-1.75=2Quartile deviation =(Q_3 - Q_1)/2=(3.75-1.75)/2=2/2=1Coefficient of Quartile deviation =(Q_3 - Q_1)/(Q_3 + Q_1)=(3.75-1.75)/(3.75+1.75)=2/5.5=0.3636

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