Re: Comparison of percentiles in SPSS

Posted by Jon K Peck on Feb 02, 2013; 3:12pm
URL: http://spssx-discussion.165.s1.nabble.com/Comparison-of-percentiles-in-SPSS-tp5717882p5717883.html

If you used a procedure such as FREQUENCIES to compute the percentiles, you can use Data > Select Cases to focus on any subset of the data you want, and bootstrapping will work on that subset.

If you use a procedure such as EXAMINE (Analyze > Descriptives ? Explore), it takes factors in the specification, and, again, bootstrapping will use the same subsets.

HTH,


Jon Peck (no "h") aka Kim
Senior Software Engineer, IBM
[hidden email]
new phone: [phone]




From:        Kai E <[hidden email]>
To:        [hidden email],
Date:        02/02/2013 07:46 AM
Subject:        [SPSSX-L] Comparison of percentiles in SPSS
Sent by:        "SPSSX(r) Discussion" <[hidden email]>

---

Hello everyone,

I need some assistance with a statistical problem:

I have calculated the 99th percentiles with their 95% confidence intervals
(using bootstrapping) for results of a blood test in a large population of
healthy subjects. Analyses had been run in SPSS 21 and show that the 99th
percentiles are quite different depending on certain background factors such
as sex, age etc.

Does anyone know if SPSS 21 offers the possibility to compare the 99th
percentiles in specific subcohorts, e.g. in men compared to women, age <65
compared to >65 years, and how to get this done?

Thanks in advance for your assistance.

Kai



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