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Author Question: If X and Y are independent random variables, which of the following identities is false? a. COV(X, ... (Read 76 times)

mcmcdaniel

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on: Jun 24, 2018
If X and Y are independent random variables, which of the following identities is false?
 a. COV(X, Y) = 1
  b. E(X + Y) = E(X) + E(Y)
  c. V(X + Y) = V(X) + V(Y)
  d. All of these choices are true.

Question 2

If X and Y are any random variables with E(X) = 5, E(Y) = 6, E(XY) = 21, V(X) = 9 and V(Y) = 10, then the relationship between X and Y is a:
 a. strong positive relationship
  b. strong negative relationship
  c. weak positive relationship
  d. weak negative relationship


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joneynes

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Reply #1 on: Jun 24, 2018
Answer to Question 1

A

Answer to Question 2

B


mcmcdaniel

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Reply 2 on: Jun 24, 2018
Great answer, keep it coming :)

Sarahjh

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Reply 3 on: Yesterday
Wow, this really help

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