SPSS Frequently Asked Questions



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SPSS Frequently Asked Questions

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How does SPSS compare to SAS and Stata?

Data Management

How do I convert among SAS, SPSS and Stata files?
How can I read hierarchical data into SPSS?
How can I compare two data files in SPSS?
How do I create and modify string (character) variables?
How can I see the number of missing values and patterns of missing values in my data file?
How can I get a count of how many cases are missing in a string variable?
How can I easily convert a string variable into a categorical numeric variable?
How can I change a string variable into a numeric variable?
How can I find differently ordered pairs in my data?

Analysis of Variance

How can I do ANOVA contrasts in SPSS?
How can I plot ANOVA cell means in SPSS?
How can I do tests of simple main effects in SPSS?
How can I explain a three-way interaction in ANOVA?
How can I use the lmatrix subcommand to understand a three-way interaction in ANOVA?
How can I use aggregate and OMS to help explain a three-way interaction in ANOVA?

Regression

How do I interpret the parameter estimates for dummy variables in regression or glm?
How can I compare regression coefficients between two groups?
How can I compare regression coefficients across three (or more) groups?
How can I do a scatterplot with regression line in SPSS?
How do I test a group of variables in SPSS regression?
Why can't I get a regression line on my scatterplot using igraph?
How can I output the results of my regression to an SPSS data file?
How can I test for mediation effects in SPSS?
How can I run a piecewise regression in SPSS?

Logistic Regression

How do I interpret odds ratios in logistic regression?

General Statistics

How do I standardize variables in SPSS?
How do I interpret the results from crosstabs?
How can I analyze my data by categories?
How can I run a logistic regression with only a constant in the model?
How can I test contrasts and interaction contrasts in a mixed model?
How can I calculate a Kappa Statistic for variables with unequal ranges of scores?
What does Cronbach's Alpha mean?
Why do I get different values of kurtosis in SAS, Stata and SPSS?
How can I test for equality of distribution?

Graphics

How can I graph two (or more) groups using different symbols?
How can I display overlapping data points on a scatterplot?

Other

What types of weights do SAS, Stata and SPSS support?
What does the keyword "to" indicate in SPSS?
How can I output my results to a data file in SPSS?
How can I renew my SPSS license?

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