sharonbullock3998 sharonbullock3998
  • 20-03-2018
  • Mathematics
contestada

Suppose x has a distribution with mean 10 and variance 4, y has a distribution with mean 20 and variance 9. you can find the mean of x + y with this information.

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LammettHash
LammettHash LammettHash
  • 21-03-2018
If this is a true/false question, then the answer is true. If you're supposed to find the mean of [tex]X+Y[/tex], then we get

[tex]\mathbb E[X+Y]=\mathbb E[X]+\mathbb E[Y]=10+20=30[/tex]

since expectation is linear.
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