Question 18 2 pts Suppose that continuous random variable X-N(9.2.3.3) and Y - N(4.1.1.6). Assuming variables...

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Question 18 2 pts Suppose that continuous random variable X-N(9.2.3.3) and Y - N(4.1.1.6). Assuming variables X and Y are ind

math Statistics-And-Probability

Answer 1

Answer #1

18.

Mean(x-y) = mean(x) - mean(y)

= 9.2 - 4.1

= 5.1

for x, y independent :

var(x-y) = var(x) + var(y)

= 3.3 + 1.6

= 4.9

therefore distribution of (x-y) : N(5.1 , 4.9)

ANSWER : option 5. N(5.1, 4.9)

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Answer 2

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