• Home
• Fundamentals
  Introduction What is statistics Terms connected to data Measurement levels Significance SPSS basics
• One variable
  Introduction a binary variable a nominal variable an ordinal variable a scale variable
• Two variables - unpaired
  Introduction binary vs binary binary vs ordinal binary vs scale nominal vs nominal nominal vs ordinal nominal vs scale ordinal vs ordinal ordinal vs scale scale vs scale
• Two variables - paired
  Introduction two nominal two ordinal two scale
• 3+ variables - paired
  Introduction 3+ binary 3+ ordinal 3+ scale
• Distributions
  Introduction Binomial Bivariate Normal Chi-Square (Standard) Normal Student t Wilcoxon (Signed Rank)
• Search

Analysing a nominal and ordinal variable

Part 2: Visualisation of the sample data (compound bar-chart)

We got a first impression from the sample data on the previous page, but a visualisation might be easier for others in our report. My preference for visualising a nominal and ordinal variable in one chart, is a compound bar-chart (also known as a stacked bar-chart). The advantage of an ordinal variable is that there is a logical order to the categories in this variable (e.g. fully disagree to fully agree), and can visualise this by stacking those. In Figure 1 the compound bar-chart from the sample data.

Figure 1. Location vs. Motivated by teacher

From the chart we see the same things as we already established from the table. In the report I recommend using a ‘Introduce – Show – Tell’ approach. So when reporting this graph, it could be for example like this:

From the sample it appears there are some differences between the three locations, but will there also be present in the population. This will be the topic for the next page.

Nominal vs. Ordinal

Introduction

Impression

Visualisation

Test differences

Post-hoc test

Effect size

Reporting

Google adds