« previous next »

Author Question: For two independent random variables X and Y, which of the following identities is always true? ... (Read 114 times)

haleyc112

  • Hero Member
  • *****
  • Posts: 600
on: Jun 24, 2018
For two independent random variables X and Y, which of the following identities is always true?
 
  A) E(2X + 3Y) = E(X) + E(Y) + 5
  B) Var(2X + 3Y) =2Var(X) + 3Var(Y)
  C) Var(2X + 3Y) = 4Var(X) + 9Var(Y)
  D) E(2X + 3Y) = 5E(X+Y)

Question 2

The interquartile range is the average of the first and third quartiles.
 
  Indicate whether the statement is true or false


bassamabas

  • Sr. Member
  • ****
  • Posts: 294
Reply #1 on: Jun 24, 2018
Answer to Question 1

C

Answer to Question 2

FALSE


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Everyone has one nostril that is larger than the other.

Did you know?

About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

Did you know?

The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.

Did you know?

The U.S. Pharmacopeia Medication Errors Reporting Program states that approximately 50% of all medication errors involve insulin.

Did you know?

Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

Random, regular, and clumped distributions. Random, regular, and clumped distributions.
Independent assortment of chromosomes at meiosis explains Mendel’s ratio Independent assortment of chromosomes at meiosis explains Mendel’s ratio
Meiosis Accounts for Independent Assortment of Alleles p1 Meiosis Accounts for Independent Assortment of Alleles p1
TrUe....FaLsE TrUe....FaLsE
Absorption & Stripping Design Random packing materials Absorption & Stripping Design Random packing materials
True Dover Sole True Dover Sole
Video: How antibiotics works? 💊

For a complete list of videos, visit our video library