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Tag Archive for spss

SPSS Files Won’t Save At Location

While working with SPSS for the first time I’ve encountered this issue while trying to edit a “.sav” file.
The editing itself goes along just fine, but when trying to save the changes an error occurs that claims that I can’t save the file to that location since it already has a file of that name (the file I started working on in the first place):

Combining Kaplan Meier curves in SPSS

I am trying to combine 3 Kaplan Meier survival curves (1-year, 3-year and 5-year) into one final curve in SPSS. Does anyone have recommendations on how to do this?

Two-way repeated measures-input issue

I just started evolving with SPSS a few weeks ago. Let’s say I want to do a statistical test to check the efficiency of 4 different pesticides over 5 weeks (the first week is the control). Every week, we take measurements. I decided to go with the two-way repeated measures ANOVA test (Analyze–> General linear model–> Repeated measurement’s selection). My issue is coming up when I have to add the second factor (I added the first factor as a five level). No matter how I insert my data, adding the second factor is impossible.

How do I use the “Calculate Adjusted P-Values” extension in SPSS after conducting a general linear model?

For example, when conducting the general linear model (GLM), SPSS gives you a post-hoc option to apply multiple comparison corrections such as Bonferroni and Tukey etc. However, after installing the “Calculate Adjusted P-Values” extension in SPSS, the Benjamini-Hochberg (BH) correction only appears in the descriptive statistics option but NOT when I conduct the GLM. Do I need to create a variable of only my p-values from the GLM and then conduct the BH correction? If so, how do I do that?

How can you change a continuous variable into a categorical variable?

I am trying to do a regression analysis, but I don’t get any results when I include an interaction term. I think what goes wrong is that in the interaction, I either have a value of 0 or 4, but I guess SPSS “thinks” it is a continuous variable and doesn’t have enough data points in between 0 and 4 to fit the regression line.
**How can I change the interaction term into a categorical variable? **

SPSS Computing Sleep Duration

I want to compute the sleep duration of my participants. As items I have the bed time and the time they got out of bed (some went to bed before 00:00 and some after). Format is hhmmss.