# Show that r 2 defined in (3.5.5) ranges between 0 and 1. You may use the Cauchy–Schwarz inequality, which states that for any random variables X and Y the following relationship holds true: [E (XY)] 2 ≤ E(X 2 ) E(Y 2 )]

Chapter 3, Exerise Questions #5

Show that r^{2} defined in (3.5.5) ranges between 0 and 1. You may use the Cauchy–Schwarz inequality, which states that for any random variables X and Y the following relationship holds true:

[E (XY)]^{2} ≤ E(X^{2}) E(Y^{2})]

## This problem has been solved!

Do you need an answer to a question different from the above? Ask your question!

**Related Book For**