Question

For 5 pairs of observations xy =
350, x-bar = 4 and y-bar = 16 then
Cov(X,Y) is​

Answer 1

Answer:

the answer is six by geometric method

Step-by-step explanation:

I hope this is helpful for you

Answer 2

Answer:

The covariance is 6

Step-by-step explanation:

• The covariance between X and Y indicates how the values of X and Y move relative to each other.
• If the value of X and Y are both large or the value of X and Y are small, the covariance is positive.
• If the value of one is more than the other, the covariance is negative.
• The formula of covariance is given by

      $cov(X,Y)=E(XY)-E(X)*E(Y)$

• Given, XY=350, E(X) =4, E(Y)=16

         $E(XY) =\frac{350}{5} \\E(XY)=70$

• covariance is

       $cov(X,Y)=E(XY)-E(X)*E(Y)$

        $cov(X,Y)=70-4*16\\cov(X,Y)=6$