The two-way ANOVA (analysis of variance) assesses the effects of two independent categorical variables on a continuous dependent variable. If you find a significant main effect for one or both of your independent variables with a two-way ANOVA – and you do not find a significant interaction effect between these variables – you can conduct … Read more
The two-way ANOVA (analysis of variance) is used to assess the effects of two independent categorical variables (such as gender and college major) – both alone and in combination with each other – on a continuous dependent variable (such as an exam score). In this tutorial we show you how to perform and interpret the … Read more
Sorting data in SPSS involves reordering the records or cases (rows) in your data set based on the values for one or more of the variables (fields or columns) in that data set. Some procedures in SPSS require that you sort your data in a specific way before you use them. In addition, sorting can … Read more
Side-by-side boxplots (or box and whisker plots) are a way of visually comparing the distribution of numeric data using the “five number summary” – the minimum, first quartile, median, third quartile, and maximum values – of two or more groups. They also allow us to identify any outliers that may exist in our data. This … Read more
A boxplot (also known as a box and whisker plot) is a way of graphically illustrating the distribution of numeric data using the “five number summary” of the data set – namely the minimum, first quartile, median, third quartile, and maximum values. It also identifies any outliers that may exist in the data set. This … Read more
SPSS allows users to make a wide variety of edits to their bar charts. In this tutorial we will show you the easiest way to make some of the most common and useful edits using the same simple bar chart. Please see our dedicated tutorial if you wish to format your SPSS chart in APA … Read more
Scatter plots allow us to visualize the relationship between two numeric variables. This quick tutorial will show you the easiest method to create a simple scatter plot in SPSS. Quick Steps Click Graphs -> Legacy Dialogs -> Scatter/Dot Select “Simple Scatter” Click “Define” Click “Reset” (recommended) Select the predictor/independent variable and move it into the … Read more
In this tutorial we show you seven edits that can make your SPSS pie charts better. Select the edits that work best for your own pie chart, and remember that the goal of your edits is to communicate your data to your audience as clearly as possible. 1. Editing Your Pie Chart in SPSS … Read more
This tutorial will show you how to calculate and interpret z scores in the SPSS statistical package. Z scores are variables that have been standardized such that they have a mean of 0 and a standard deviation of 1. Quick Steps Click Analyze -> Descriptive Statistics -> Descriptives Click “Reset” (recommended) Selected the variable(s) that … Read more
This tutorial will show you how to create a stem and leaf plot in the SPSS statistical package. Quick Steps Click Analyze -> Descriptive Statistics -> Explore Click “Reset” (recommended) Move the variable you wish to plot into the “Dependent List” box Click the “Plots” button Ensure the “Stem-and-leaf” option is selected under “Descriptive” Under … Read more
This tutorial will show you the quickest method to create a stacked bar chart to visualize the relationship between two variables in the SPSS statistical package. Quick Steps Click Graphs -> Legacy Dialogs -> Bar Select “Stacked” and “Summaries for groups of cases” Click Define Move the variable you wish to display on the horizontal … Read more
This tutorial will show you the quickest method to create a clustered bar chart to visualize the relationship between two variables in the SPSS statistical package. Quick Steps Click Graphs -> Legacy Dialogs -> Bar Select “Clustered” and “Summaries for groups of cases” Click Define Select the variable you wish to display on the horizontal … Read more