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jayz657

  • 3 years ago

what is standard deviation of w if w=x+y+z show me the how to do the identity please

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  1. wio
    • 3 years ago
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    Do you remember the equation for the standard deviation?

  2. jayz657
    • 3 years ago
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    |dw:1359694387149:dw|

  3. wio
    • 3 years ago
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    Just sub in \(x+y\) for \(x\) and see what happens.

  4. jayz657
    • 3 years ago
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    not i dont think thats quite right sorry i know theres an identity for this

  5. wio
    • 3 years ago
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    You will probably use identities as you go.

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