Splitting Files
In SPSS to
Analysis Data "by group"
See
www.stattutorials.com/SPSSDATA
for files mentioned in this tutorial © TexaSoft, 2008
These SPSS statistics tutorials briefly explain the use and
interpretation of standard statistical analysis techniques for Medical,
Pharmaceutical, Clinical Trials, Marketing or Scientific Research. The examples
include how-to instructions for SPSS Software.
Splitting Files (Data/Split File)
This
example is adapted from information in
Statistical Analysis Quick Reference
Guidebook (2007).
The following example shows how to split your data
set into two or more groups in order to perform an analysis "by group." (This
example uses SPSS version 16, but the process is the same in most versions.)
For example, suppose you want to analyze your data
by sex. That is, you want to perform one analysis on males only and the same
analysis on females only.
Step 1: Open the data set name EX.SAV
(See
www.stattutorials.com/SPSSDATA)
Step 2: From the menus, select
DATA/Split File...the following dialog box appears. Click on the radio
button titled "Organize output by groups."
Step 3: Select the sex variable in the box
at the left, and click on the arrow at the "Groups based on" box.
Step 4: Click OK. Now, subsequent analyses
will reflect the split.
Step 5: For example, run descriptives on
Age and TIME1. That is, from the menus select Analyze/ Descriptive
Statistic/ Descritpives, select AGE & TIME1 as variables to analyze as
shown below:
Step 6: Notice that the output contains the
analysis split by the two values of SEX. See below:
Descriptives
SEX = 0
SEX = 1
Step 7: Important -- to get back to
"normal" where the data are not split, go back to Data/Split Files...
and select the option "Analyze All cases."
See
www.stattutorials.com/SPSSDATA
for files mentioned in this tutorial © TexaSoft, 2008
We recommend this book:
Statistical
Analysis Quick Reference Guidebook: With SPSS Examples is a practical
"cut to the chase" handbook that quickly explains the when, where, and how of
statistical data analysis as it is used for real-world decision-making in a wide
variety of disciplines. In this one-stop reference, the authors provide succinct
guidelines for performing an analysis, avoiding pitfalls, interpreting results,
and reporting outcomes. Paperback.
Sage Publishers ISBN:
1412925606
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