Talk About Network

Google


Register and Login
Nick
Password
Register create new account Sign up is FREE and you can post replies, new topics, bookmark posts and more!
Recover lost password


Alternative > Astrology moderated > Chi square no g...
Latest [ Topics | Posts ] Archive Post A New Topic Post a Reply
<< Topic < Post Post 1 of 4 Topic 2529 of 2603
Post > Topic >>

Chi square no good for the basketballers

by "Ray Murphy" <raymur@[EMAIL PROTECTED] > May 5, 2008 at 10:19 PM

Hi All,

The recent discussions about how often the basketballers scores could
occur by chance motivated me to make up a little program to find out
exactly what was happening by testing with random numbers..

The Chi square theory in statistics says it was a 30 in 1000 chance 
and
Hermes was saying a graph like that could ocur 100 in 1000 times by
chance but my experiments have shown repeatedly that (contrary to
established statistical theory) it is actually about 2.25 per 1000.

The experiment involved generating random numbers from 0.000 to
0.9999 and placing a score of 1 in the first graph line for all 
numbers
under 0.5000 and placing a score of 1 in the second graph line for all
numbers over 0.5000 in sets of 502 random numbers, representing
502 basketballers.

4.000 tests were done and there were 9 cases out of 4,000 where the
score was as good or better than the basketballers score I got (with a
gap of 68 or more between the low and high score) which is 2.25 per
1000.

A second and third seies of 4000 tests showed another 9 and 7cases.

Summary:
* Hermes ..............100 per 1000
* Statistical theory... 30 per 1000 -- (Chi square and p-score)
* Experiment(1) ...2.25 per 1000 = 9/4000
* Experiment(2)....2.25 per 1000 = 9/4000
* Experiment(2)....1.75 per 1000 = 7/4000

This information needs to be independently verified with separate
programming of random data  but it would appear that the Chi
square formula is quite useless in the range for several hundred
factors of 2 types - such as the 502 basketballers.

Astrologers who are using Chi square could easily be throwing
away interesting results if they are not aware of this.

Ray
 




 4 Posts in Topic:
Chi square no good for the basketballers
"Ray Murphy" &l  2008-05-05 22:19:41 
Re: Chi square no good for the basketballers
Ray Murphy <raymur@[EM  2008-05-06 10:32:50 
Re: Chi square no good for the basketballers
"Richard Nolle"  2008-05-06 11:15:48 
Re: Chi square no good for the basketballers
Ray Murphy <raymur@[EM  2008-05-06 15:33:40 

Post A Reply:
  Go here to Signup

AddThis Feed Button


About - Advertising - Contact - Frequently Asked Questions - Privacy Policy - Terms of Use - Signup

Contact
tan12V112 Wed Jul 23 23:06:44 CDT 2008.