Mean SD X 350 30 Y 470 46 Two random independent variables: What is the standard deviation
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Question:
| Mean | SD | |
| X | 350 | 30 |
| Y | 470 | 46 |
Two random independent variables:
What is the standard deviation of SD(1.4X+0.6Y). I am confused about the notation for linear combination of random variables.
Is it:
- SD(1.4X+0.6Y)=1.4(30)2+0.6(46)2))=50.29
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