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

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Answer:

The coefficient  is  $r =0.81$

Step-by-step 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

      $r = [ \frac{cov(x,y)}{ \sqrt{s_x^2} * \sqrt{s_y^2} } ]^2$

substituting values

      $r = [ \frac{ 1260}{ \sqrt{1600} * \sqrt{1225} } ]^2$

     $r =0.81$