## Comparing 99th percentiles

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anandak
Posts: 14
Joined: Sat Oct 06, 2007 9:04 am

### Comparing 99th percentiles

Hi, I was wondering if anyone can help me with this problem:

How do you determine whether the 99th percentile of a distribution is significantly different (at p < .05) from the 99th percentile of another distribution?

All help deeply appreciated

PAK
statman
Posts: 2750
Joined: Tue Jun 12, 2007 12:08 pm
Location: Florida, USA
While not specifically at any percentile, the chi sq can test association
See the note below

Statman
Statistical Services
anandak
Posts: 14
Joined: Sat Oct 06, 2007 9:04 am

### 99th percentile

Hi Statman,

Thanks for your reply. Chi-square test is for testing association between two non-parametric variables. Can it be used in my case since the 99th percentile is from a interval variable.

Moreover we are comparing the 99th percentile of distribution/ variable A with the 99th percentile of another distribution/variable B - this is a test of difference between them. Thought we should use a parametric test but do not know which and how.

Any help appreciated.

PAK

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