« previous next »

Author Question: The covariance of two variables X and Y: a. must be between -1 and +1. b. must be positive. c. ... (Read 90 times)

drink

  • Hero Member
  • *****
  • Posts: 554
on: Jun 24, 2018
The covariance of two variables X and Y:
 a. must be between -1 and +1.
  b. must be positive.
  c. can be any real number.
  d. None of these choices.

Question 2

If X and Y are random variables with E(X) = 6 and E(Y) = 9, then E(2X + 3Y) is:
 a. 39
  b. 15
  c. 27
  d. 12


ladyjames123

  • Sr. Member
  • ****
  • Posts: 346
Reply #1 on: Jun 24, 2018
Answer to Question 1

C

Answer to Question 2

A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

drink

  • Hero Member
  • *****
  • Posts: 554
Reply #2 on: Jun 24, 2018
Correct answers!


ladyjames123

  • Sr. Member
  • ****
  • Posts: 346
Reply #3 on: Jun 24, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

Did you know?

Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

Did you know?

Blood is approximately twice as thick as water because of the cells and other components found in it.

Did you know?

Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.

Did you know?

In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

Stay positive Stay positive
Positive and Negative Symptoms of Schizophrenia Positive and Negative Symptoms of Schizophrenia
Empathy draws a more positive response from the patient because it is based on the willingness of th Empathy draws a more positive response from the patient because it is based on the willingness of th
HIV-positive men with a high number of life stressors progress more quickly to AIDS than those with ... HIV-positive men with a high number of life stressors progress more quickly to AIDS than those with ...
Positive and negative selection during T-cell development. Positive and negative selection during T-cell development.
Bulk flow by positive pressure (pressure Bulk flow by positive pressure (pressure
Video: Simple Diffusion - gases and nonpolar compounds transport

For a complete list of videos, visit our video library