Diff for "FAQ/percentile" - CBU statistics Wiki
location: Diff for "FAQ/percentile"
Differences between revisions 2 and 3
⇤ ← Revision 2 as of 2006-07-20 13:29:08 →
Size: 343
Editor: pc0082
Comment:
← Revision 3 as of 2006-07-20 13:31:38 → ⇥
Size: 345
Editor: pc0082
Comment:
Deletions are marked like this. Additions are marked like this.
Line 1: Line 1:

Line 7: Line 5:
This follows from P(X < x) = 1 – EXP(-R*score) where rate, R, is estimated from the sample data by 1/mean. This follows from

P(X < x) = 1 – EXP(-R*score)
where rate, R, is estimated from the sample data by 1/mean.

If the data follows an exponential distribution (test this by using Kolmogorov-Smirnov test in SPSS and choosing the exponential option). Then

- (Mean score) (LN(1- PERC/100 ) gives the threshold of the PERC% percentile.

This follows from

P(X < x) = 1 – EXP(-R*score) where rate, R, is estimated from the sample data by 1/mean.

None: FAQ/percentile (last edited 2013-03-08 10:17:24 by localhost)