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  • Aug 1, 2012, 12:21 PM
    nyc123rr
    Math help
    for a group of four men , the probability distribution for the number x who live through the next year is as given in the accompanying table. Find out the mean and the standard deviation
    x | p(x)
    0 | 0.05
    1 | 0.15
    2 | 0.45
    3 | 0.25
    4 | 0.10
  • Aug 1, 2012, 12:22 PM
    Unknown008
    Use the formulae that you know of. What do you get?

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