Author Question: If X and Y are two random variables with x = 3.8, y = 4.2, and Cov(X, Y) = -0.25, then Var(X + Y) = ... (Read 55 times)

swpotter12 · **on:** Jun 24, 2018

If X and Y are two random variables with x = 3.8, y = 4.2, and Cov(X, Y) = -0.25, then Var(X + Y) = 31.58.

Indicate whether the statement is true or false

Question 2

What can the manager infer about the relationship between the square of the level of output and the average costs?

A) As the level of output increases, average costs decrease at an increasing rate.
B) As the level of output increases, at first average costs decrease, then will start to increase.
C) As the level of output increases, at first average costs increase, then will start to decrease.
D) As the level of output increases, average costs increase at an increasing rate.