IBM SPSS Step-by-Step Guide: Correlation
Note: This guide is an example of creating correlation output in SPSS with the grades.sav file. The variables shown in this guide do not correspond with the actual variables assigned in Unit 6 Assignment 1. Carefully follow the assignment instructions for a list of assigned variables. Screen shots were created with SPSS 21.0.
Unit 6 Assignment 1: Correlations
Refer to the Unit 6 assignment instructions for a list of assigned variables. The example variables “quiz1” and “quiz2” are shown below.
Step 1. Open grades.sav in SPSS.
DAA Section 2: Assumptions of Correlation
To complete Section 2 of the DAA, you will generate SPSS output for histograms, descriptive statistics, and a scatter plot.
Step 2. Generate SPSS histogram output for the assigned Unit 6 assignment variables. See the Week 3 Step-by-Step Guide for complete instructions on generating histograms. Select Graphs à Legacy Dialogs à Histogram…
Create separate histograms for the two Unit 6 assignment 1 assigned variables. Paste the two histograms into Section 2 of the DAA template. Provide a visual interpretation. The examples of quiz1 and quiz2 are shown below.
Step 3. Next, you will generate descriptive statistics for your assigned Unit 6 Assignment 1 variables. Refer to the Week 3 Step-by-Step Guide for complete instructions on generating descriptives output.
Below the descriptive statistics output, interpret the skewness and kurtosis values.
Step 4. Create the SPSS scatter plot for your assigned Unit 6 Assignment 1 variables. Select Graphs à Legacy Dialogs à Scatter/Dot…
A new window appears. Select “Simple Scatter” and press Define.
The Simple Scatterplot option appears. Place the assigned variables in the X Axis (horizontal) and Y Axis (vertical) as required in the Unit 6 Assignment 1 instructions. The examples of quiz1 and quiz2 are shown below. Press OK.
Paste the scatter plot output into the DAA template. Provide an interpretation of the scatter plot.
DAA Section 4: Intercorrelation Matrix
To complete DAA Section 4, generate the SPSS Intercorrelation matrix of all assigned Unit 6 Assignment 1 variables. The example variables of “quiz1,” “quiz2,” “quiz3,” and “quiz4” are shown below.
Step 5. Select Analyze à Correlate à Bivariate…
The Bivariate Correlations window appears. Move the assigned Unit 6 assignment variables into the Variables window. Make sure that the “Pearson” option, “Two-tailed” option, and “Flag significant correlations” options are selected.
Press OK. The intercorrelation matrix appears. Copy this intercorrelation matrix into Section 4 of the DAA and interpret it as instructed in the assignment instructions.
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