23. Find the coefficient of correlation if n = 50, ox = 4.5, oy = 3.5 Edxdy = 420
A. 0.5333
B. 0.586
C. 0.653
D. 0.546
Answers
Given : n = 50 , σₓ = 4.5 , σy = 3.5 ∑dxdy = 420
To Find : coefficient of correlation
A. 0.5333
B. 0.586
C. 0.653
D. 0.546
Solution:
coefficient of correlation = ∑dxdy / ( n σₓ . σy)
=> coefficient of correlation = 420 / ( 50 * 4.5 * 3.5)
=> coefficient of correlation = 420 / ( 225 * 3.5)
=> coefficient of correlation = 120 / ( 225 )
=> coefficient of correlation = 24 / ( 45 )
=> coefficient of correlation = 8 / (15 )
=> coefficient of correlation =0.533
option A is correct
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