When variables A and B are independent, the variance of A - B is ...

[EAugust]

When variables A and B are independent, the variance of A - B is equal to
 
  a. the variance of A plus the variance of B.
  b. the variance of A.
  c. variance of A minus the variance of B.
  d. it cannot be determined from the information given here.

Question 2

The variance sum law deals with
 
  a. the variance of the sum of two or more variables.
  b. the variance of the difference of two or more variables.
  c. the variance of any single variable.
  d. both a) and b).

[Shshxj]

Answer to Question 1

A

Answer to Question 2

D

[EAugust]

Thank you!

[Shshxj]

Happy to help