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Introduction to Econometrics 3rd Edition by James Stock, Mark Watson
النسخة 3الرقم المعياري الدولي: 978-9352863501Introduction to Econometrics 3rd Edition by James Stock, Mark Watson
النسخة 3الرقم المعياري الدولي: 978-9352863501 تمرين 4
Consider two random variables X and Y. Suppose that Y takes on k values y 1 ,..., y k and that X takes on l values x 1 ,..., x l.
a. Show that
.
b. Use your answer to (a) to verify Equation (2.19).
c. Suppose that X and Y are independent. Show that xy = 0 and corr( X , Y ) = 0.
a. Show that
.b. Use your answer to (a) to verify Equation (2.19).
c. Suppose that X and Y are independent. Show that xy = 0 and corr( X , Y ) = 0.
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We are asked to consider two random vari...
Introduction to Econometrics 3rd Edition by James Stock, Mark Watson
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