The Covariance Inequality States That A $\quad 0 \leq \sigma _ { X Y } ^ { 2 } \leq 1$

question 29

Short Answer

The covariance inequality states that a. $\quad 0 \leq \sigma _ { X Y } ^ { 2 } \leq 1$ .
b. $\sigma _ { X Y } ^ { 2 } \leq \sigma _ { X } ^ { 2 } \sigma _ { Y } ^ { 2 }$ .
c. $\sigma _ { X Y } ^ { 2 } - \sigma _ { X } ^ { 2 } \leq \sigma _ { Y } ^ { 2 }$ .
d. $\quad \sigma _ { X Y } ^ { 2 } \leq \frac { \sigma _ { X } ^ { 2 } } { \sigma _ { Y } ^ { 2 } }$ .

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