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A Simple Scatterplot using SPSS

Introduction

A simple scatterplot can be used to (a) determine whether a relationship is linear, (b) detect outliers and (c) graphically present a relationship. For example, determining whether a relationship is linear (or not) is an important assumption if you are analysing your data using a Pearson's product-moment correlation, Spearman's rank-order correlation, simple linear regression or multiple regression. If you are analysing your data using an ANCOVA (analysis of covariance), you will need to consider a grouped scatterplot instead (N.B., if you need help creating a grouped scatterplot using SPSS, we show you how in our enhanced content).

The purpose of this guide is to show you how to create a scatterplot using SPSS. Before we show you this SPSS procedure, we introduce you to the example we have used.

SPSS

Example

A salesman for a large car brand wants to determine whether there is a relationship between an individual's income and the price they pay for a car. The salesman will use this information to determine which cars to offer potential customers in new areas where average income is known. Therefore, the dependent (outcome) variable is Price, and the independent (predictor) variable is Income.

Note: The example is based on the data from our "quick start" linear regression guide. If you want to analyse your data using linear regression, our "quick start" guide will help get you started.

SPSS

Test Procedure in SPSS

The 7 steps that follow show you how to create a simple scatterplot in SPSS using the example above (N.B., if you creating a simple scatterplot as part of "linear regression" analysis, you may also need to add a "line of best fit" and "confidence and prediction intervals" to your scatterplot. We show you how to do this, as well as creating a grouped scatterplot using SPSS, in our enhanced content).

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SPSS

Output

You will be presented with the following simple scatterplot:

A Simple Scatterplot in SPSS

Published with written permission from SPSS Inc., an IBM Company.

Note: If you need help creating a grouped scatterplot using SPSS, we show you how in our enhanced content.

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