two series X and Y , 50 items each, have standard deviation 4 5 and 3 5 respectively if the - Economics - Correlation

Question

two series X and Y , 50 items each, have standard deviation 4 5 and
3 5 respectively if the sumission of the product of deviations of X
and Y series from their respective arithmetic mean is 420 , find
the coefficient of corelation between X and Y

Vaishali Nebhwani · Accepted Answer

Dear student,

Given, N= 50
σx = 4 5σy = 3 5

∑xy = 420

r = ∑ xyNσxσyr = 42050×4
5×3 5r = 420787 5r= 0 533

Coefficient of correlation = 0 533

Regards

two series X and Y , 50 items each, have standard deviation 4.5 and 3.5 respectively.if the sumission of the product of deviations of X and Y series from their respective arithmetic mean is 420 , find the coefficient of corelation between X and Y.