Question

Find the covariance of x1, x2, and x1, x3, x4 for the random variables x1, x2, x3, x4 defined in example 7.

Answer 1

The covariance of x1, x2, and x1, x3, x4 for the random variables x1, x2, x3, x4 can be found using the formula for covariance, but I need more information to provide a step-by-step explanation and calculation.

Step-by-step explanation:

The covariance of x1 and x2 can be found using the formula for covariance: Cov(x1, x2) = E[(x1 - E[x1])(x2 - E[x2])].

Similarly, the covariance of x1, x3, and x4 can be found using the same formula.

However, to provide a step-by-step explanation and calculate the covariance, I would need to know the values of x1, x2, x3, and x4 or more information about Example 7 mentioned in your question.