What is Factor Analysis? Quick Data Check Running Factor Analysis in SPSS SPSS Factor Analysis Output Adding Factor Scores to Our Data What is Factor Analysis? Factor analysis is a statistical technique for identifying which underlying factors are measured by a (much larger) number of observed variables.Such “underlying factors” are often variables that are difficult […]
Correlation Test – What Is It? Null Hypothesis Assumptions Correlation Test in SPSS Reporting Correlation Test – What Is It? A (Pearson) correlation is a number between -1 and +1 that indicates to what extent 2 metric variables are linearly related. It’s best understood by looking at some scatterplots. In short, a correlation of -1 indicates a perfect linear descending relation: higher scores on […]
1. SPSS Case Count and Variable Count (Overview and data file are are found here) The very first thing we want to know about basically any data file, are its dimensions: how many cases and how many variables does it contain? For a quick case count, select any cell in data view and press the CTRL + shortkey. Alternatively, just […]
Summary SPSS CORRELATIONS generates tables with Pearson correlations and their underlying N’s and p-values.* This tutorial quickly walks through its main options, using freelancers.sav for demonstrational purposes. User Missing Values Before running any correlations, we’ll first specify all values of one million dollars or more as user missing values for income_2010 through income_2014.* We’ll do so by running the following line […]
When running correlations in SPSS, we get the significance levels as well. In some cases, we don’t want that: if our data hold an entire population, such p-values are actually nonsensical. For some stupid reason, we can’t get correlations without significance levels from the correlations dialog. However, this tutorial shows 2 ways for getting them anyway. We’ll use adolescents.sav throughout. Correlation Table as Recommended […]
