送交者: steven 于 July 16, 2001 11:03:42:
回答: statistical result. 由 steven 于 July 16, 2001 02:21:01:
here:
As I said earlier, when you deal with 9 occurence, you extend the random variable to X=9, which means,
you take all 9 tossing into account, and your event space is not [X] where X \in {H, T}, the event
space is now a 9 tuples [X_1, X_2, X_3,..., X_9] it is a different problem. Also, small probablity
doesn't mean that it will not happen, unless it is 0.
Also, another way to define of probability is that in an experiment, let the set of all possible events
to be U, and a particular event E,the number of times that E occures when the number of experiment
tends to infinity is P(E) = |E|/|U|. So tossing 9 times doesn't tell much.
note: traditionaly tuples use the angle bracket "greater" than and "less than," however, html also
uses them.