Given independent random variables with means and standard deviations as shown, find the mean and standard deviation

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Given independent random variables with means and standard deviations as shown, find the mean and standard deviation of:
a) 2Y + 20
b) 3X
c) 0.25X + Y
d) X - 5Y
e) X1 + X2 + X3

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Stats Data and Models

ISBN: 978-0321986498

4th edition

Authors: Richard D. De Veaux, Paul D. Velleman, David E. Bock

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Question Posted: Jan 20, 2016 05:57 AM

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Given independent random variables with means and standard deviations as shown, find the mean and standard deviation

Question:

Mean SD X 80 12 Y 12 3

Step by Step Answer:

a E2Y 20 2EY 20 212 20 44 SD2Y 20 2SDY 23 6 b E3X 3EX 380 240 SD3X 3SDX 312 36 c E0...View the full answer

Stats Data and Models

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