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 57 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
Gracias!

carojassy25

  • Member
  • Posts: 299
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Did you know?

Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

Did you know?

By definition, when a medication is administered intravenously, its bioavailability is 100%.

Random, regular, and clumped distributions. Random, regular, and clumped distributions.
Taking off is one of the main times albatrosses use flapping to fly, and is the most energetically d Taking off is one of the main times albatrosses use flapping to fly, and is the most energetically d
Example of variance documentation Example of variance documentation
Cereal-box readers will read the information on the box as many as 12 times Cereal-box readers will read the information on the box as many as 12 times
Calculate the physical variables Calculate the physical variables
Genomic and fossil evidence has been used to estimate the times of divergence of human and Neanderth Genomic and fossil evidence has been used to estimate the times of divergence of human and Neanderth
Video: Coronary Heart Disease

For a complete list of videos, visit our video library