Beefy Boxes and Bandwidth Generously Provided by pair Networks
P is for Practical

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

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
Comment on Re^2: [OT] Statistics question.
Select or Download Code

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1016043]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others studying the Monastery: (5)
As of 2016-05-25 03:49 GMT
Find Nodes?
    Voting Booth?