srutkowske366 srutkowske366
  • 12-07-2017
  • Mathematics
contestada

Let the random variable x be equally likely to assume any of the values 1/11, 2/11, or 3/11. determine the mean and variance of x.

Respuesta :

Аноним Аноним
  • 12-07-2017
mean of x  = (1/11 + 2/11 +3/11) / 3  = 6/11 / 3  = 2/11

variance 

1/11 - 2/11 = -1/11; 2/11 - 2/11 = 0 ;  3/11 - 2/11 = 1/11

(-1/11)^2 = 1/121 ,  0^2 = 0  , (1/11)^2 = 1/121

1/121 + 0 + 1/121  = 2/121 

Variance  = 1/121 / 3   = 1 /363
Answer Link

Otras preguntas

The liquid portion of the blood left after the clotting process is called
Those who are ill should see a specialist before visiting their primary care physician. Please select the best answer from the choices provided. T F
An animal which eats only animals is called a(n): carnivore herbivore omnivore scavenger
Being unchangeable is one of God's attributes called _____
Define what is meant by hazard and risk.
it takes 1 1/2 hours to set up a computer workstation at this rate how many hours it takes u to set up 7 workstation
Sound waves travel faster through air than through solids. a. True b. False
why does the Giver appear a little sad at the end of first day training?
An atom or group of atoms with a positive charge is a(n) _____. A. anion B. monatomic C. cation D. element
5+9 numerical expression into words