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Re: Probabilities
Posted:
Mar 15, 2007 3:04 AM


On Mar 13, 4:26 pm, Anonymous wrote: > Hi all, > > I've got the following phrase: > > BABAAAAAABAAABBAAAAAABA > > I would like to calculate the conditional probability P(BA). > If I use a logical thought, I get: > > P(BA) = the_number_of_AB / the_number_of_A = 4 / 17 = 0.23 > > and if I use the formula P(BA) = P(B inter A)/P(A) I get: > P(B inter A) = 4 / (231) > and P(A) = 17/23 then: > > P(BA) = 4/22 * 23/17 = 0.25 > > So I would like to know why the "logical thought" is wrong and if the > result is right with the formula. > > Thanks a lot
Instead A and B, A.A.Markov counted vowels and consonants in a Pushkine poem, and based his theory of chains on the matrix of these counts. kunzmilan



