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Question

Calculate the Spearman's ranks correlation coefficient for the following data and interpret the result:

X35548095737335918381Y40607590707538957571

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Solution

XYRank XRank Yd=Rank XRank Yd23540121154602311807545119590862473703.54.51173753.551.52.25353811009195770083756511817054.50.50.25

d2=11.5

m1= no. of times rank repeated X=2

m2= no. of times rank repeated y=2

n= no. of ranks =10

Sperman rank correlation coefficient =r=16d2+112(m13m1)+112(m23m2)n(n21)
r=16(11.5)+112(232)+112(232)10(1001)r=193990=1.09393=0.9060

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