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  • 03-07-2021
  • Mathematics
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X and Y are independent random variables. X has mean 100 and standard deviation 12. Y has mean 30 and standard deviation 9. What are the mean and standard deviation of (X–Y)?

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tenzinyoezerst
tenzinyoezerst tenzinyoezerst
  • 03-07-2021

Answer:

mean:70

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