Question

if sum of uivi is 50 and n=15 where ui and vi are deviations of x and y series from thier respective mean, then Cov(X,Y) is
a 2.43
b 3.33
c 3.24
d 3.63​

Answer 1

Answer:

0.5

Step-by-step explanation:

Cov(x,y)=30

V(x)=25

V(y)=144

As we know formula of Corelation coefficient is:−

Let r be Corelation coefficient of x,y

Then,

r=

V(x)×V(y)

Covariance(x,y)

on solving:−

⇒r=

25×144

30

⇒r=0.5