eashatallat eashatallat
  • 15-02-2021
  • SAT
contestada

S.D(X) = 6 and S.D(Y) = 8. If X and Yare independent random variables, then S.D(X-Y) is:

Respuesta :

fichoh
fichoh fichoh
  • 21-02-2021

Answer:

14

Explanation:

For independent variables X and Y;

S.D(X - Y) is expanded as :

S.D(X) + S.D(Y)

If S.D(X) = 6 and S.D(Y) = 8 ; where, X and Y are independent ;

SD(X-Y) = SD(X) + SD(Y)

SD(X - Y) = 6 + 8

SD(X - Y) = 14

Answer Link

Otras preguntas

Identify the nation that exerted imperial control over India, impacting their language and religious beliefs. A. China B. Germany C. Britain D. Argentina
Questions: 1. What is your weather forecast? 2. Was your forecast correct? If so, explain why you think you came to the correct conclusion. If not, explain w
How to say 'Good morning in polish'?
What is 9/16 closest to 0,1/2, or 1 and why?
How many atoms does a molecule of sodium chloride contain?
radius: 12 diameter: 24 inches circumference: area:
which kind of relationship would a dog and a tick have
What is the right ascension and declination of spica
What describes the path of blood between the heart and the lungs
Give the components of the vector whose length is 10 and whose direction opposes the direction of [–4, 3].