This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: If the coefficient of correlation r = 0 .80, the standard deviations of X and Y are 20 and 25, ... (Read 35 times)

vicky

  • Hero Member
  • *****
  • Posts: 586
on: Jun 24, 2018
If the coefficient of correlation r = 0 .80, the standard deviations of X and Y are 20 and 25, respectively, then Cov(X, Y) must be 400.
 a. True
  b. False
   Indicate whether the statement is true or false

Question 2

The test for the equality of two population variances is based on the:
 a. difference between the two sample variances.
  b. ratio of the two sample variances.
  c. sum of the two sample variances.
  d. product of the two sample variances.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

janeli1

  • Sr. Member
  • ****
  • Posts: 330
Reply #1 on: Jun 24, 2018
Answer to Question 1

TRUE

Answer to Question 2

B


vicky

  • Member
  • Posts: 586
Reply 2 on: Jun 24, 2018
YES! Correct, THANKS for helping me on my review

tuate

  • Member
  • Posts: 332
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.

Did you know?

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

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Did you know?

Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

How to write a quadratic equation in standard form when a graph is given How to write a quadratic equation in standard form when a graph is given
Massage is used as a complement to standard medical treatment in hospitals and skilled nursing ... Massage is used as a complement to standard medical treatment in hospitals and skilled nursing ...
How to quickly determine the maximum or minimum value of a quadratic equation in standard form How to quickly determine the maximum or minimum value of a quadratic equation in standard form
Some Standard Shapes of Greek Vessels Some Standard Shapes of Greek Vessels
Write the following in standard form Write the following in standard form
The coefficient of the restitution of an object is defined as the ratio of its outgoing to ... The coefficient of the restitution of an object is defined as the ratio of its outgoing to ...
Video: Diversity of Living Creatures - Charles Darwin & the Beagle's Voyage

For a complete list of videos, visit our video library