mickula
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 Nov18 awarded Popular Question Nov14 awarded Notable Question Sep24 awarded Autobiographer Apr2 awarded Popular Question Nov14 awarded Popular Question Jan21 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 ? Jan21 comment Poisson distribution, mean time and probability of waiting $P(X < \frac{1}{2} ) = 1-e^{- \lambda \frac{1}{2}}$ ? Jan21 comment Poisson distribution, mean time and probability of waiting so a) 36/60, sooooo 0,6 minutes?, is the time, right? Jan21 awarded Supporter Jan21 accepted Poisson distribution, mean time and probability of waiting Jan21 awarded Student Jan21 asked Poisson distribution, mean time and probability of waiting Jan20 comment Normal probability distribution with absolute value of X Ok, now I see that u did it on-the-fly. Thank you. Jan20 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? Jan20 accepted Normal probability distribution with absolute value of X Jan20 comment Normal probability distribution with absolute value of X I believe I wrongly interpeted absolute value in just added part of my solution. Jan20 revised Normal probability distribution with absolute value of X added 114 characters in body Jan20 asked Normal probability distribution with absolute value of X Jan19 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 Jan19 awarded Editor