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Question

Given below is the percentage of marks secured by 5 students in Economics and Statistics.

StudentsABCDEMarks in Economics6048495055Marks in Statistics8560556575
Calculate the coefficient of rank correlation.

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Solution

Calculation of Rank correlation

Marks in EconomicsR1Marks in StatisticsR2D=R1R2D260185100485604+11494555115036530055275200D2=2

Here, N=5 and D2=2
Rk=16D2N3N=16×2535=112120
=10.1=+0.90

Rk=+0.90

It indicates that there is high degree of correlation between the marks in Economics and Statistics.


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