Question

If c o v (x comma space y )space equals space 1260, s subscript x squared equals 1600, and s subscript y squared equals 1225 , then the coefficient of determination is:

Answer 1

Complete Question

The complete question is shown on the first uploaded image

Answer:

The coefficient is
`r =0.81`

Explanation:

From the question we are told that

`cov(x, y )= 1260`

`s_x^2 = 1600`

`s_y^2 = 1225`

Generally the coefficient of determination is mathematically represented as

`r = [ (cov(x,y))/( √(s_x^2) * √(s_y^2) ) ]^2`

substituting values

`r = [ ( 1260)/( √(1600) * √(1225) ) ]^2`

`r =0.81`