Hi,
A simple quantile question:
I need to calculate the 95% and 5% quantiles (aka percentiles) for the
following data:
67.12
64.51
62.06
55.45
51.41
43.78
10.74
10.14

if I use the formula: 95% quantile point= 95 (8+1)/100, I get the 8.55th
point as the 95% quantile. Which does not make too much sense as I have only
8 data points.
The other option is to use (95*8)/100 = 7.6th data point (which can be found
by interpolation between the 7th and 8th data points).
Reportedly, the second formula is not too accurate. However in my case the
first formula does not make much sense.

Any advice?

TIA,
Anjan

-- 
=============================
anjan purkayastha, phd
bioinformatics analyst
whitehead institute for biomedical research
nine cambridge center
cambridge, ma 02142

purkayas [at] wi [dot] mit [dot] edu
703.740.6939

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