Knowee
Questions
Features
Study Tools

If X and Y are independent random variables with means E[X] = 2 and E[Y] = 3, what is the expected value of XY?Review LaterE[XY] = 5E[XY] = 6E[XY] = 7E[XY] = 8

Question

If X and Y are independent random variables with means E[X] = 2 and E[Y] = 3, what is the expected value of XY?

  • E[XY] = 5
  • E[XY] = 6
  • E[XY] = 7
  • E[XY] = 8
🧐 Not the exact question you are looking for?Go ask a question

Solution

Break Down the Problem

  1. Identify the given values: We have two independent random variables, X and Y, with means E[X]=2E[X] = 2 and E[Y]=3E[Y] = 3.
  2. Determine the formula: For independent random variables, the expected value of their product is the product of their expected values, i.e., E[XY]=E[X]E[Y]E[XY] = E[X] \cdot E[Y].

Relevant Concepts

  1. Independence of Random Variables: For independent random variables XX and YY, we know that: E[XY]=E[X]E[Y] E[XY] = E[X] \cdot E[Y]

Analysis and Detail

  1. Substituting the Values:

    • Substituting the means: E[XY]=E[X]E[Y]=23 E[XY] = E[X] \cdot E[Y] = 2 \cdot 3
  2. Perform the Calculation: E[XY]=6 E[XY] = 6

Verify and Summarize

  1. Verification:
    • Independent random variables mean we can multiply their expected values. Thus, our calculation checks out.
  2. Summary: The expected value of the product of independent random variables XX and YY is confirmed to be 6.

Final Answer

E[XY]=6 E[XY] = 6

This problem has been solved

Similar Questions

If 𝑋X and 𝑌Y are independent random variables with 𝐸[𝑋]=1E[X]=1, Var(𝑋)=2Var(X)=2, 𝐸[𝑌]=3E[Y]=3, and Var(𝑌)Var(Y) = 4, then find 𝐸[(2𝑋+3𝑌)2]E[(2X+3Y) 2 ].

f X is a random variable with possible outcomes 3 and 8, with  P( X = 3) = 0, then E(X) is

If X is a random variable with possible outcomes 3 and 8, with  P( X = 3) = 0, then E(X) is

Let X and Y be two continuous random variables, Find E(X+Y)*E(X)+E(Y)E(X)-E(Y)E(X)E(Y)E(X)/E(Y)

The coefficient of correlation between the two variables X and Y is 0.6. Their covariance is 3.6 and variance of X is 4. The variance of Y is3.55.54.59

1/1

Upgrade your grade with Knowee

Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.