Mathematics, 30.01.2022 01:00 Nicoleebel1386

A random variable X has a mean of 120 and a standard deviation of 15. A random variable Y has a mean of 100 and a standard deviation of 9. If X and Y are independent, approximately what is the standard deviation of X - Y

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A random variable X has a mean of 120 and a standard deviation of 15. A random variable Y has a mean...

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