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seen Dec 2 '13 at 14:31

first steps in rails, semi-advanced in php


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Jan
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comment Poisson distribution, mean time and probability of waiting
Well, point for you. Thanks for explaining. When it comes to b) I have to do that foreach k := 1 to 30 probabilities are $0$ and... what next? $P(X < 30 ) = 1-e^{- \lambda k} + e^{- \lambda k+1} $ etc ?
Jan
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comment Poisson distribution, mean time and probability of waiting
$ P(X < \frac{1}{2} ) = 1-e^{- \lambda \frac{1}{2}}$ ?
Jan
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comment Poisson distribution, mean time and probability of waiting
so a) 36/60, sooooo 0,6 minutes?, is the time, right?
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accepted Poisson distribution, mean time and probability of waiting
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asked Poisson distribution, mean time and probability of waiting
Jan
20
comment Normal probability distribution with absolute value of X
Ok, now I see that u did it on-the-fly. Thank you.
Jan
20
comment Normal probability distribution with absolute value of X
just simply got one more question: when normalizing why didn't you touch -25 and 25? Shouldn't it be $1-P( \frac{-25-30}{5} ... )$ and same for 25?
Jan
20
accepted Normal probability distribution with absolute value of X
Jan
20
comment Normal probability distribution with absolute value of X
I believe I wrongly interpeted absolute value in just added part of my solution.
Jan
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revised Normal probability distribution with absolute value of X
added 114 characters in body
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asked Normal probability distribution with absolute value of X
Jan
19
comment How to calculate minimal member of set having mean and standard deviation?
Seems like it was really easy. Thanks to @BrianM.Scott he pointed me that it goes about whole population of tennis players, not only about top, and ofc to you, Andre
Jan
19
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