Faced with the fact that I can not express a formula on paper / console, as it seemed to me, a trivial task. Suppose there is an event that in 55% has a value of 1, in 25% - 2, in 20% - 3. What would the formula for the average value of these unlikely outcomes look like?

  • four
    Weighted average, 1.65 - Mirdin
  • 3
    There are different means, mainly used: arithmetic mean, square root mean, and harmonic mean. - nick_n_a
  • one
    @Mirdin thanks. the case when a very concise answer followed by a googling gave the result) - cruim

1 answer 1

If X is a discrete random variable with a distribution

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then from the definition of the Lebesgue integral it follows that

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  • If we talk about the Lebesgue integral, it is probably worth mentioning that he here took from the definition of a mat. waiting - VladD
  • @VladD This is a quote from Wikipedia :) - Harry