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

Author Question: The variance of the sum of two random variables is the sum of their variances plus two times the ... (Read 58 times)

NClaborn

  • Hero Member
  • *****
  • Posts: 560
on: Jun 24, 2018
The variance of the sum of two random variables is the sum of their variances plus two times the covariance.
 
  Indicate whether the statement is true or false

Question 2

Approximately what proportion of the observations is between 476 and 524?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

iman

  • Sr. Member
  • ****
  • Posts: 334
Reply #1 on: Jun 24, 2018
Answer to Question 1

TRUE

Answer to Question 2

The values 476 and 524 are within  one standard deviation of the mean; hence the Empirical Rule implies that the proportion of the observations between these two values is approximately 0.68


NClaborn

  • Member
  • Posts: 560
Reply 2 on: Jun 24, 2018
Great answer, keep it coming :)

Jossy

  • Member
  • Posts: 336
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Did you know?

More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.

Did you know?

A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

Did you know?

Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

Scattergrams are a mechanism used by political scientists to show patterns and relationships among v Scattergrams are a mechanism used by political scientists to show patterns and relationships among v
How to manually solve a linear system with three variables without matrices (Question 1 of 2) How to manually solve a linear system with three variables without matrices (Question 1 of 2)
Inhalers used to deliver asthmatic drugs: (a) Metered-dose inhaler. The patient times the inhalation ... Inhalers used to deliver asthmatic drugs: (a) Metered-dose inhaler. The patient times the inhalation ...
Foundations of American Education: Becoming Effective Teachers in Challenging Times Foundations of American Education: Becoming Effective Teachers in Challenging Times
Two complementary angles are drawn such that one angle is 10 degree more than seven times the ... Two complementary angles are drawn such that one angle is 10 degree more than seven times the ...
Sonja is paid $42.50 per hour as a veterinarian. She is paid 1 times the regular rate for all ... Sonja is paid $42.50 per hour as a veterinarian. She is paid 1 times the regular rate for all ...
Video: Humerus Adduction Animation

For a complete list of videos, visit our video library