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Summary Introduction to Statistics - Notes for the SPSS test

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Course
410127-B-5

Institution
Tilburg University (UVT)

This is a summary including all necessary notes for the SPSS test as part of the Introduction to Statistics course. The course is part of the study program for first year Bachelor students of the HR, GMSI and Sociology studies.

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Uploaded on January 26, 2024
Number of pages 7
Written in 2022/2023
Type Summary

spss
spss exam
spss test
statistics course
introduction to statistics

Institution
Tilburg University (UVT)
Education
Introduction to Statistics
Course
410127-B-5

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Notes for the SPSS test:

The first step of statistical analysis is usually inspecting descriptive statistics.

Analyze → Descriptive Statistics → Frequencies (how many people, percentage, males,
missing v.)

Analyze → Descriptive Statistics → Descriptives (the mean, standard deviation)

Create a histogram of a variable:

- Navigate to Graphs → Legacy Dialogs → Histogram
● Make sure to check the box 'Display Normal Curve'

Create a scatter plot:

● Navigate to Graphs > Legacy dialogs > Scatter/dot .
● Choose a Simple scatter and click on Define.
● Now put the variable Instructions on the x-axis, and Usefulness on the y-axis.
● Click 'Ok' to run the analysis.

To find errors, you can sort the data file by a variable.

- Data → Sort Cases and then delete the stange value

To compare groups (smokers, non-smokers);

- Data → Split File → Compare Groups and choose the variable you want them to be
grouped by
- Then you can calculate the descriptive statistics again.

The difference between the sample mean and the test value = the mean difference

Reversing variables:

You can either compute a new variable (Transform → Compute Variable) with the formula
new var = 3 - old var, or you can recode the original variable (Transform → Recode
into Different Variables) and specify the old and new values manually.

, Compute a new variable
Using a wide variety of mathematical functions, you can compute new variables based on highly
complex equations.
1. From the menus in the Data Editor window choose: Transform > Compute Variable...
2. For Target Variable, enter jobstart.
3. Select Age in years [age] in the source variable list and click the arrow button to copy it to the
Numeric Expression text box.
4. Click the minus (–) button on the calculator pad in the dialog box (or press the minus key on the
keyboard).
5. Select Years with current employer [employ] and click the arrow button to copy it to the expression.

Recode a variable

● Navigate to Transform → Recode into Different Variables
● Select the first input variable
● Name the first output variable ….rec
● Click ‘Change’ ; the screen should now show this: vmat12 → vmat12rec
● Click the button “Old and New Values” and
-10 thru -1 -> 1
0 -> 2

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