Table of Contents
Preface xii
1 An Overview of IBM® SPSS® Statistics 1
Introduction: An Overview of IBM SPSS Statistics 27 and Subscription Classic 1
1.1 Necessary Skills 1
1.2 Scope of Coverage 2
1.3 Overview 3
1.4 This Book's Organization, Chapter by Chapter 3
1.5 An Introduction to the Example 4
1.6 Typographical and Formatting Conventions 5
2A IBM SPSS Statistics Processes for PC 8
2.1 The Mouse 8
2.2 The Taskbar and Start Menu 8
2.3 Common Buttons 10
2.4 The Data and Other Commonly Used Windows 10
2.5 The Open Data File Dialog Window 13
2.6 The Output Window 16
2.7 Modifying or Rearranging Tables 19
2.8 Printing or Exporting Output 22
2.9 The "Options …" Option: Changing the Formats 24
2B IBM SPSS Statistics Processes for Mac 26
2.1 Selecting 26
2.2 The Desktop, Dock, and Application Folder 27
2.3 Common Buttons 27
2.4 The Data and Other Commonly Used Windows 28
2.5 The Open Data File Dialog Window 30
2.6 The Output Window 33
2.7 Modifying or Rearranging Tables 36
2.8 Printing or Exporting Output 39
2.9 The "Options …" Option: Changing the Formats 41
3 Creating and Editing a Data File 43
3.1 Research Concerns and Structure of the Data File 43
3.2 Step by Step 44
3.3 Entering Data 51
3.4 Editing Data 52
3.5 Grades.sav: The Sample Data File 54
Exercises 58
4 Managing Data 59
4.1 Step By Step: Manipulation of Data 60
4.2 The Case Summaries Procedure 60
4.3 Replacing Missing Values Procedure 63
4.4 The Compute Procedure: Creating New Variables 66
4.5 Recoding Variables 69
4.6 The Select Cases Option 73
4.7 The Sort Cases Procedure 75
4.8 Merging Files Adding Blocks of Variables or Cases 77
4.9 Printing Results 81
Exercises 82
5 Graphs and Charts: Creating and Editing 83
5.1 Comparison of the Two Graphs Options 83
5.2 Types of Graphs Described 83
5.3 The Sample Graph 84
5.4 Producing Graphs and Charts 85
5.5 Bugs 87
5.6 Specific Graphs Summarized 88
5.7 Printing Results 99
Exercises 100
6 Frequencies 101
6.1 Frequencies 101
6.2 Bar Charts 101
6.3 Histograms 101
6.4 Percentiles 102
6.5 Step by Step 102
6.6 Printing Results 108
6.7 Output 108
Exercises 111
7 Descriptive Statistics 112
7.1 Statistical Significance 112
7.2 The Normal Distribution 113
7.3 Measures of Central Tendency 114
7.4 Measures of Variability Around the Mean 114
7.5 Measures of Deviation from Normality 114
7.6 Measures of Size of the Distribution 115
7.7 Measures of Stability: Standard Error 115
7.8 Step by Step 115
7.9 Printing Results 119
7.10 Output 119
Exercises 120
8 Crosstabulation and χ2 Analyses 121
8.1 Crosstabulation 121
8.2 Chi-Square (χ2) Tests of Independence 121
8.3 Step by Step 123
8.4 Weight Cases Procedure: Simplified Data Setup 127
8.5 Printing Results 129
8.6 Output 129
Exercises 131
9 The Means Procedure 132
9.1 Step by Step 132
9.2 Printing Results 136
9.3 Output 136
Exercises 138
10 A Priori Power Analysis: What Sample Size Do I Need? 139
10.1 One-Sample t Test 141
10.2 Independent-Samples t Test 142
10.3 Paired-Samples t Test 143
10.4 One-Way ANOVA 144
10.5 Correlation 146
10.6 Regression 147
10.7 Printing Results 148
Exercises 149
11 Bivariate Correlation 151
11.1 What is a Correlation? 151
11.2 Additional Considerations 153
11.3 Step by Step 154
11.4 Printing Results 158
11.5 Output 159
Exercises 160
12 The t Test Procedure 161
12.1 Independent-Samples t Tests 161
12.2 Paired-Samples t Tests 161
12.3 One-Sample t Tests 162
12.4 Significance and Effect Size 162
12.5 Step by Step 163
12.6 Printing Results 167
12.7 Output 168
Exercises 171
What is Bootstrapping? 172
13 The One-Way ANOVA Procedure 173
13.1 Introduction to One-Way Analysis of Variance 173
13.2 Step by Step 174
13.3 Printing Results 179
13.4 Output 179
Exercises 183
14 General Linear Model: Two-Way ANOVA 185
14.1 Statistical Power 185
14.2 Two-Way Analysis of Variance 186
14.3 Step by Step 187
14.4 Printing Results 190
14.5 Output 190
Exercises 192
15 General Linear Model: Three-Way ANOVA 193
15.1 Three-Way Analysis of Variance 193
15.2 The Influence of Covariates 194
15.3 Step by Step 195
15.4 Printing Results 197
15.5 Output 197
15.6 A Three-Way ANOVA that Includes a Covariate 202
Exercises 206
16 Simple Linear Regression 209
16.1 Predicted Values and the Regression Equation 209
16.2 Simple Regression and the Amount of Variance Explained 211
16.3 Testing for a Curvilinear Relationship 211
16.4 Step by Step 214
16.5 Printing Results 218
16.6 Output 219
16.7 A Regression Analysis that Tests for a Curvilinear Trend 220
Exercises 221
17 Multiple Regression Analysis 224
17.1 The Regression Equation 224
17.2 Regression and R2: The Amount of Variance Explained 226
17.3 Curvilinear Trends, Model Building, and References 226
17.4 Step by Step 228
17.5 Printing Results 233
17.6 Output 233
17.7 Change of Values as Each new Variable is Added 234
Exercises 237
18 Nonparametric Procedures 238
18.1 Step by Step 239
18.2 Are Observed Values Distributed Differently than a Hypothesized Distribution? 241
18.3 Is the Order of Observed Values Non-Random? 243
18.4 Is a Continuous Variable Different in Different Groups? 244
18.5 Are the Medians of a Variable Different for Different Groups? 246
18.6 Are My Within-Subjects (Dependent Samples or Repeated Measures) Measurements Different? 247
18.7 Printing Results 250
19 Reliability Analysis 251
19.1 Coefficient Alpha (α) 252
19.2 Split-Half Reliability 252
19.3 The Example 252
19.4 Step by Step 253
19.5 Printing Results 257
19.6 Output 257
Exercises 262
20 Multidimensional Scaling 263
20.1 Square Asymmetrical Matrixes (The Sociogram Example) 264
20.2 Step by Step 265
20.3 Printing Results 271
20.4 Output 271
21 Factor Analysis 274
21.1 Create a Correlation Matrix 274
21.2 Factor Extraction 274
21.3 Factor Selection and Rotation 275
21.4 Interpretation 277
21.5 Step by Step 278
21.6 Output 284
22 Cluster Analysis 287
22.1 Cluster Analysis and Factor Analysis Contrasted 287
22.2 Procedures for Conducting Cluster Analysis 288
22.3 Step by Step 290
22.4 Printing Results 296
22.5 Output 296
23 Discriminant Analysis 301
23.1 The Example: Admission into a Graduate Program 302
23.2 The Steps Used in Discriminant Analysis 302
23.3 Step by Step 304
23.4 Output 309
24 General Linear Models: MANOVA and MANCOVA 316
24.1 Step by Step 317
24.2 Printing Results 324
24.3 Output 325
Exercises 330
25 G.L.M.: Repeated-Measures MANOVA 331
25.1 Step by Step 332
25.2 Printing Results 337
25.3 Output 337
Exercises 341
26 Logistic Regression 342
26.1 The Math of Logistic Regression 342
26.2 Step by Step 343
26.3 Printing Results 347
26.4 Output 348
27 Hierarchical Log-Linear Models 352
27.1 Log-Linear Models 352
27.2 The Model Selection Log-Linear Procedure 353
27.3 Step by Step 354
27.4 Printing Results 358
27.5 Output 358
28 Nonhierarchical Log-Linear Models 364
28.1 Models 364
28.2 A Few Words about Model Selection 365
28.3 Types of Models Beyond the Scope of This Chapter 365
28.4 Step by Step 366
28.5 Printing Results 370
28.6 Output 370
29 Residuals: Analyzing Left-Over Variance 373
29.1 Residuals 373
29.2 Linear Regression: A Case Study 374
29.3 General Log-Linear Models: A Case Study 376
29.4 Accessing Residuals in SPSS 380
Data Files 383
Glossary 387
References 393
Credits 395
Index 397