The aim of this book is to provide clear guidelines to both the execution of specific statistical tests and the interpretation of the findings by
(1) explaining clearly the purpose of specific tests and the research designs for which they are relevant,
(2) demonstrating clearly the instructions for executing univariate and multivariate statistical tests, and
(3) explaining how obtained results should be interpreted.
1.1 Introduction...................................................................................................1
1.2 Inferential Statistics ......................................................................................1
1.2.1 Hypothesis Testing.......................................................................2
1.2.2 Types of Hypotheses....................................................................2
1.2.3 Testing Hypotheses ......................................................................3
1.2.4 Level of Significance ....................................................................4
1.2.5 Type I and Type II Errors............................................................4
1.3 Test Selection .................................................................................................5
1.3.1 The Nature of Hypotheses: Test of Difference vs. Test
of Relationship ..............................................................................6
1.3.1.1 Test of Differences .......................................................6
1.3.1.2 Test of Relationships ...................................................7
1.3.2 Levels of Measurement ...............................................................7
1.3.3 Choice of Test................................................................................8
2 Introduction to SPSS ................................................................... 11
2.1 Introduction................................................................................................. 11
2.2 Setting up a Data File ................................................................................12
2.2.1 Preparing a Code Book .............................................................12
2.2.2 Data Set ........................................................................................13
2.2.3 Creating an SPSS Data File.......................................................13
2.2.4 Data Entry....................................................................................16
2.2.5 Saving and Editing a Data File ................................................16
2.3 SPSS Analysis: Windows Method vs. Syntax Method.........................17
2.3.1 SPSS Analysis: Windows Method............................................18
2.3.2 SPSS Analysis: Syntax Method ................................................19
2.3.3 SPSS Output ................................................................................21
Frequencies ..................................................................................21
Frequency Table..........................................................................21
2.3.4 Results and Interpretation ........................................................23
3 Multiple Response ....................................................................... 25
3.1 Aim ...............................................................................................................25
3.2 Methods of MULT RESPONSE Procedures ...........................................25
3.3 Example of the Multiple-Dichotomy Method .......................................26
3.3.1 Data Entry Format......................................................................26
3.3.2 Windows Method.......................................................................27
3.3.3 SPSS Syntax Method..................................................................29
3.3.4 SPSS Output ................................................................................29
3.3.5 Results and Interpretation ........................................................30
3.4 Example of the Multiple-Response Method ..........................................30
3.4.1 Windows Method.......................................................................31
3.4.2 SPSS Syntax Method..................................................................33
3.4.3 SPSS Output ................................................................................33
3.4.4 Results and Interpretation ........................................................34
3.5 Cross-Tabulations .......................................................................................34
3.5.1 Windows Method.......................................................................34
3.5.2 SPSS Syntax Method..................................................................38
3.5.3 SPSS Output ................................................................................39
3.5.4 Results and Interpretation ........................................................40
4 T-Test for Independent Groups .................................................. 41
4.1 Aim ...............................................................................................................41
4.2 Checklist of Requirements ........................................................................41
4.3 Assumptions................................................................................................42
4.4 Example........................................................................................................42
4.4.1 Data Entry Format......................................................................42
4.4.2 Windows Method.......................................................................42
4.4.3 SPSS Syntax Method..................................................................44
4.4.4 SPSS Output ................................................................................44
4.4.5 Results and Interpretation ........................................................45
5 Paired-Samples T-Test.................................................................. 47
5.1 Aim ...............................................................................................................47
5.2 Checklist of Requirements ........................................................................47
5.3 Assumptions................................................................................................47
5.4 Example........................................................................................................48
5.4.1 Data Entry Format......................................................................48
5.4.2 Windows Method.......................................................................48
5.4.3 SPSS Syntax Method..................................................................49
5.4.4 SPSS Output ................................................................................49
5.4.5 Results and Interpretation ........................................................50
6 One-Way Analysis of Variance, with Post Hoc
Comparisons ................................................................................. 51
6.1 Aim ...............................................................................................................51
6.2 Checklist of Requirements ........................................................................51
6.3 Assumptions................................................................................................51
6.4 Example........................................................................................................52
6.4.1 Data Entry Format......................................................................52
6.4.2 Windows Method.......................................................................52
6.4.3 SPSS Syntax Method..................................................................54
6.4.4 SPSS Output ................................................................................55
Post Hoc Tests .............................................................................55
6.4.5 Results and Interpretation ........................................................56
6.4.6 Post Hoc Comparisons ..............................................................56
7 Factorial Analysis of Variance .................................................... 57
7.1 Aim ...............................................................................................................57
7.2 Checklist of Requirements ........................................................................57
7.3 Assumptions................................................................................................58
7.4 Example 1 — Two-Way Factorial (2 × 2 Factorial) ...............................58
7.4.1 Data Entry Format......................................................................58
7.4.2 Windows Method.......................................................................59
7.4.3 SPSS Syntax Method..................................................................62
7.4.4 SPSS Output ................................................................................62
7.4.5 Results and Interpretation ........................................................63
7.4.5.1 Main Effect..................................................................63
7.4.5.2 Interaction Effect........................................................63
7.4.6 Post Hoc Test for Simple Effects..............................................64
7.4.7 Data Transformation ..................................................................65
7.4.7.1 Windows Method ......................................................65
7.4.7.2 Post Hoc Comparisons: Windows Method ...........68
7.4.7.3 Post Hoc Comparisons: SPSS Syntax Method......70
7.4.8 SPSS Output ................................................................................71
7.4.9 Results and Interpretation ........................................................71
7.5 Example 2 — Three-Way Factorial (2 × 2 × 2 Factorial) ......................71
7.5.1 Data Entry Format......................................................................72
7.5.2 Windows Method.......................................................................72
7.5.3 SPSS Syntax Method..................................................................77
7.5.4 SPSS Output ................................................................................77
7.5.5 Results and Interpretation ........................................................80
7.5.5.1 Main Effects ................................................................80
7.5.5.2 Two-Way Interactions ...............................................80
7.5.5.3 Three-Way Interaction...............................................83
8 General Linear Model (GLM) Multivariate Analysis.............. 85
8.1 Aim ...............................................................................................................85
8.2 Checklist of Requirements ........................................................................85
8.3 Assumptions................................................................................................86
8.4 Example 1 — GLM Multivariate Analysis: One-Sample Test.............86
8.4.1 Data Entry Format......................................................................87
8.4.2 Windows Method.......................................................................87
8.4.3 SPSS Syntax Method..................................................................91
8.4.4 SPSS Output ................................................................................91
8.4.5 Results and Interpretation ........................................................92


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