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Re^2: [OT] Statistics question.

by BrowserUk (Pope)
on Jan 30, 2013 at 11:55 UTC ( #1016043=note: print w/ replies, xml ) Need Help??

in reply to Re: [OT] Statistics question.
in thread [OT] Statistics question.

the expectation value is simply 1e6 * P(1) = 1e6 * 1e6/2**32 = 232.83 ... the standard deviation is simply the square root of the expectation value, so 15.5.

Based upon a run of 100 samples, that seems to match quite nicely:

C:\test>bitvec2 -N=100 100 Mean: 230.95 stddev:14.75

I'm doing a run of 1000 samples, and if that shows no surprises, I'll be taking your figures as read and basing my testing upon it.

Thank you.

Update: The 1000 sample run marries well (good enough):

C:\test>bitvec2 -N=1000 1000 Mean: 233.39 stddev:15.79

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