Author Question: If X and Y are two variables with x = 3.8, y = 4.2, and COV(X, Y) = -0.25, then V(X + Y) = 31.58. ... (Read 57 times)

tth

  • Hero Member
  • *****
  • Posts: 579
If X and Y are two variables with x = 3.8, y = 4.2, and COV(X, Y) = -0.25, then V(X + Y) = 31.58.
  Indicate whether the statement is true or false

Question 2

If X and Y are two variables with E(XY) = 10.56, E(X) = 4.22, and E(Y) = 5.34, then COV(X, Y) = 1.0.
  Indicate whether the statement is true or false



kxciann

  • Sr. Member
  • ****
  • Posts: 356
Answer to Question 1

T

Answer to Question 2

F



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.

Did you know?

The average office desk has 400 times more bacteria on it than a toilet.

Did you know?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

Did you know?

In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

For a complete list of videos, visit our video library