Normal Probability Plot Test for Regression in SPSS Complete

Normal Probability Plot Test for Regression in SPSS Complete | Procedures that must be fulfilled in the regression analysis are data that are normally distributed. The way to find out a normal or abnormal data can be done with a probability plot.

Case Example of Normal Probability Plot Test for Regression in SPSS

The company manager wants to find out whether the regression model influences Competence on Employee Performance with normal or abnormal distribution. For research purposes, the manager collects Competency and Performance data from 40 existing employees. The research data is as follows.

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Step by Step Normal Probability Plot Test for Regression in SPSS

1. Open the new SPSS worksheet, then click Variable View to fill in the name and property of the research variable with the following conditions.

Variable "Competence" then fill in:
Name: write X
Type: select Numeric
Width: select 8
Decimals: select 0
Label: write Competence
Values: select None
Missing: select None
Columns: select 8
Align: select Right
Measure: Select Scale
Role: Select Input

Variable "Performance" then fill in:
Name: write Y
Type: select Numeric
Width: select 8
Decimals: select 0
Label: write Performance
Values: select None
Missing: select None
Columns: select 8
Align: select Right
Measure: Select Scale
Role: Select Input
The screen will look like the picture below.

2. After that, click Data View, then enter data Competence in column X and Performance data in column Y

3. From the menu in SPSS, select the Analyze - Regression - Linear

4. The "Linear Regression" dialog appears, then enter the Performance [Y] variable into the Dependent column. Then enter the Competence [X] variable into the Independent(s) column, then click Plots...

5. A "Linear Regression: Plots" dialog appears, then give a check mark (V) to the Normal probability plot, then click Continue

6. The last process click Ok. So at the end, the SPSS Charts output appears.

Decision Making Procedure for Normal Probability Plot Test

1. If the points follow the diagonal line, it can be concluded that the residual value is normally distributed.
2. Conversely, if the points do not follow the diagonal line, it can be concluded that the residual value is abnormally distributed.

Interpretation Normal Probability Plot Test for Regression in SPSS

Based on Normal Chart Probability The above plot, we can see that the existing points always follow and approach the diagonal line. Thus, it can be concluded that the residual value is normally distributed so that the regression analysis procedure has been fulfilled.

~~~ Thank you ~~~

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