working with Ranges

[Wade Hiscock]

Hi all,

I have this data and I want to show a range that contains 95% of
them...ie.
95% of data falls between these two values.  I would then like to repeat

this using whatever % I desire, like 80%, 70% etc.

If someone can show me the syntax for this it would be greatly
appreciated.

Cheers.
Wade

Wade Hiscock
Fisheries Biologist
Centre for Sustainable Aquatic Resources (CSAR)
<http://www.mi.mun.ca/csar>
Marine Institute of Memorial University of Newfoundland
P.O. Box 4920, St. John's, Newfoundland, Canada
A1C 5R3

Tel.: [phone]
Fax.: [phone]
My Research
<http://www.mun.ca/research/directory/index.php?content=browse.php&resea
rcher=477>

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[Marta Garcia-Granero]

Wade Hiscock wrote:
> I have this data and I want to show a range that contains 95% of
> them...ie.
> 95% of data falls between these two values.  I would then like to repeat
>
> this using whatever % I desire, like 80%, 70% etc.
>
> If someone can show me the syntax for this it would be greatly
> appreciated.
>
Use FREQUENCIES and ask for percentiles:

95% range: percentiles 2.5 & 97.5
95% range.percentiles 5 & 95
80% range: percentiles 10 & 90

and so on

See this example:

DATA LIST FREE/copper(F8.2).
BEGIN DATA
0.70 0.45 0.72 0.30 1.16 0.69 0.83 0.74 1.24 0.77
0.65 0.76 0.42 0.94 0.36 0.98 0.64 0.90 0.63 0.55
0.78 0.10 0.52 0.42 0.58 0.62 1.12 0.86 0.74 1.04
0.65 0.66 0.81 0.48 0.85 0.75 0.73 0.50 0.34 0.88
END DATA.
VARIABLE LABEL copper 'Urinary copper (µmol/24hr)'.

FREQUENCIES
  VARIABLES=copper
  /FORMAT=NOTABLE
  /PERCENTILES= 2.5 5 10 90 95 97.5.

HTH,
Marta García-Granero

--
For miscellaneous statistical stuff, visit:
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