One of the most common research questions is do different groups have different mean scores on some variable? This question is best answered in 3 steps: create a table showing mean scores per group -you’ll probably want to include the frequencies and standard deviations as well; create a chart showing mean scores per group; run some statistical test –ANOVA in this case. However, this […]
In some cases, ALTER TYPE in SPSS version 24 seems to report incorrect altered values when converting a string to a numeric value. This results in messed up data while SPSS reports that everything is fine. Let’s try and replicate the problem with the example below. Example We imported some .csv data in which some numeric values were flagged with an “a”. This indicates […]
SPSS hasn’t exactly been known for generating nice charts, although you really can do so by using your own chart templates. SPSS 25, however, allows you to “create great looking charts by default!” This made me wonder: are the new charts really that great? The remainder of this article walks through the old and new looks for the big 5 charts in […]
A sign test for one median is often used instead of a one sample t-test when the latter’s assumptions aren’t met by the data. The most common scenario is analyzing a variable which doesn’t seem normally distributed with few (say n < 30) observations. * This tutorial shows how to run and interpret a sign test in SPSS. We’ll […]
