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AP Statistics
Unit 4 – Probability, Random Variables, and Probability Distributions
Topic 4.9
If X and Y are two independent random variables and Z = X + Y, what is the mean of Z?
The difference of the means of X and Y.
The sum of the means of X and Y.
The product of the means of X and Y.
The mean of Z cannot be determined without additional information.
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AP Statistics - 4.9 Combining Random Variables
Key terms
Independent Random Variables
Mean
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About Fiveable
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Resources
Cram Mode
AP Score Calculators
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Crisis Text Line
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© 2024 Fiveable Inc. All rights reserved.
AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.
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