Ask Question
6 July, 12:51

X and Y are independent random variables. X is normally distributed with mean 1 and variance 1. Y is normally distributed with mean 3 and variance 5. What is the variance of Y - 2X?

+4
Answers (1)
  1. 6 July, 16:46
    0
    1

    Step-by-step explanation:

    Equation of variance:

    Total Variance = sum (i=1, N) {c^2, variance^2}

    = c1^2*variance1^2 + c2^2*variance2^2 + ...

    Variance of X = 1

    Variance of Y = 5

    Variance of Y - 2X = (1^2) * (5) - (2^2) * * (1)

    = 5 - 4 = 1
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “X and Y are independent random variables. X is normally distributed with mean 1 and variance 1. Y is normally distributed with mean 3 and ...” in 📙 Mathematics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers