Astrology Statistics for Dummies

Astrology Statistics for dummies:
[Finding Chi squared with only 2 bars in a graph]

(abbreviations commonly used are X^2 -- or --  Chi2)

Example below is from the Basketballers thread:

Virgo score . = 285
Taurus score = 217
----------------------
SUM .......... = 502
----------------------
Expected score for Virgo   = 251
Expected score for Taurus = 251

Formula:
X^2 = (Obs score - Exp score) squared, divided by Expected score

X^2 = (285 - 251) = 34 squared = 1156 divided by 251 = 4.6056

To find the p-score (probability of this occurring by chance) go to
this online calculator and enter the Chi squared value of 4.6056 with
ONE degree of freedom. Answer is p = 0.0319
http://www.anu.edu.au/nceph/surfstat/surfstat-home/tables/chi.php

To convert the p-score into intelligible probability numbers for
astrologers we divide it into 1.
1 divided by 0.0319 = 33.3480

This means that if we repeat the test with 33 more sets of 502
VIR + TAU basketballers we might get the same good p-score
again just by chance.

Ray