# IBM SPSS Statistics 19 Guide to Data Analysis

- ©2012
- | Pearson
- | Out of print

- Marija Norusis
- Inc. SPSS

- ©2012
- | Pearson
- | Out of print

The **IBM SPSS Statistics 19 Guide to Data Analysis **is a friendly introduction to both data analysis and IBM SPSS Statistics 19, the world’s leading desktop statistical software package. Easy-to-understand explanations and in-depth content make this guide both an excellent supplement to other statistics texts and a superb primary text for any introductory data analysis course. With this book, you’ll learn how to describe data, test hypotheses, and examine relationships using IBM SPSS Statistics.

Author Marija Norušis incorporates a wealth of real data, including the General Social Survey and studies of Internet usage, opinions of the criminal justice system, marathon running times, library patronage, and the importance of manners, throughout the examples and expanded chapter exercises. This unique combination of examples, exercises, and contemporary data gives you hands-on experience in analyzing data and makes learning about data analysis and statistical software relevant, unintimidating, and even fun!

A data CD-ROM is included with this book.

Norusis & SPSS Inc.

- ©2011
- | Pearson
- | Paper
- | 672 pp
- | ISBN-13: 9780321690586

**Readers' questions**are anticipated and clearly addressed in special sections scattered throughout the book.**To help you focus**on the contents, each chapter begins with a set of questions that are addressed in the chapter.**Datasets**from a variety of disciplines are included in this book.**Detailed instructions**are given for obtaining all of the output shown in the book.**Statistical concept and data analysis exercises**are included with each chapter.**SPSS Inc.**staff have reviewed the book for accuracy.

The book has been updated for Release 19.0 of the software, including new screenshots of windows and dialog boxes, as well as changes to the operating procedures.

**PART 1. GETTING STARTED WITH IBM SPSS STATISTICS**

**1. Introduction**

About This Book

Getting Started with IBM SPSS Statistics

Describing Data

Testing Hypotheses

Examining Relationships

Lets Get Started

**2. An Introductory Tour of IBM SPSS Statistics**

Starting IBM SPSS Statistics

Help Is Always at Hand

Copying the Data Files

Opening a Data File

Statistical Procedures

The Viewer Window

Viewer Objects

The Data Editor Window

Entering Non-Numeric Data

Clearing the Data Editor without Saving Changes

The IBM SPSS Statistics Online Tutorial

The IBM SPSS Statistics Toolbar

The IBM SPSS Statistics Help System

Contextual Help

What’s Next?

**3. Sources of Data**

Know Your Data

Survey Data

Asking the Question

Measuring Time

Selecting Participants

Selecting a Sample

General Social Survey

Random-Digit Dialing

Internet Surveys

Designing Experiments

Random Assignment

Minimizing Bias

Summary

What’s Next?

Exercises

**PART 2. DESCRIBING DATA**

**4. Counting Responses**

Describing Variables

A Simple Frequency Table

Sorting Frequency Tables

Pie Charts

Bar Charts

Summarizing Internet Time

Histograms

Mode and Median

Percentiles

Summary

What’s Next?

How to Obtain a Frequency Table

Format: Appearance of the Frequency Table

Statistics: Univariate Statistics

Charts: Bar Charts, Pie Charts, and Histograms

Exercises

**5. Computing Descriptive Statistics**

Summarizing Data

Scales of Measurement

Mode, Median, and Arithmetic Average

Comparing Mean and Median

Summarizing Time Spent Online

Measures of Variability

Range

Variance and Standard Deviation

The Coefficient of Variation

Standard Scores

Summary

What’s Next?

How to Obtain Univariate Descriptive Statistics

Options: Choosing Statistics and Sorting Variables

Exercises

**6. Comparing Groups**

Age, Education, and Internet Use

Plotting Means

Layers: Defining Subgroups by More than One Variable

Summary

What’s Next?

How to Obtain Subgroup Means

Layers: Defining Subgroups by More than One Variable

Options: Additional Statistics and Display of Labels

Exercises

**7. Looking at Distributions**

Marathon Completion Times

Age and Gender

Marathon Times for Mature Runners

Summary

What’s Next?

How to Explore Distributions

Explore Statistics

Graphical Displays

Options

Exercises

**8. Counting Responses for Combinations of Variables**

Library Use and Education

Row and Column Percentages

Bar Charts

Adding Control Variables

Library Use and the Internet

Summary

What’s Next?

How to Obtain a Crosstabulation

Layers: Three or More Variables at Once

Cells: Percentages, Expected Counts, and Residuals

Bivariate Statistics

Format: Adjusting the Table Format

Exercises

**9. Plotting Data**

Examining Population Indicators

Simple Scatterplots

Scatterplot Matrices

Overlay Plots

Three-Dimensional Plots

Identifying Unusual Points

Rotating 3-D Scatterplots

Summary

What’s Next?

How to Obtain a Scatterplot

Obtaining a Simple Scatterplot

Obtaining an Overlay Scatterplot

Obtaining a Scatterplot Matrix

Obtaining a 3-D Scatterplot

Editing a Scatterplot

Exercises

**PART 3. TESTING HYPOTHESES**

**10. Evaluating Results from Samples**

From Sample to Population

A Computer Model

The Effect of Sample Size

The Binomial Test

Summary

What’s Next?

Exercises

**11. The Normal Distribution**

The Normal Distribution

Samples from a Normal Distribution

Means from a Normal Population

Are the Sample Results Unlikely?

Testing a Hypothesis

Means from Non-Normal Distributions

Means from a Uniform Distribution

Summary

What's Next?

Exercises

**12. Testing a Hypothesis about a Single Mean**

Examining the Data

The T Distribution

Calculating the T Statistic

Confidence Intervals

Other Confidence Levels

Confidence Interval for a Difference

Confidence Intervals and Hypothesis Tests

Null Hypotheses and Alternative Hypotheses

Rejecting the Null Hypothesis

Summary

What's Next?

How to Obtain a One-Sample T Test

Options: Confidence Level and Missing Data

Exercises

**13. Testing a Hypothesis about Two Related Means**

Marathon Runners in Paired Designs

Looking at Differences

Is the Mean Difference Zero?

Two Approaches

The Paired-Samples T Test

Are You Positive?

Some Possible Problems

Examining Normality

Summary

What's Next?

How to Obtain a Paired-Samples T Test

Options: Confidence Level and Missing Data

Exercises

**14. Testing a Hypothesis about Two Independent Means**

Examining Television Viewing

Distribution of Differences

Standard Error of the Mean Difference

Computing the T Statistic

Output from the Two-Independent-Samples T Test

Confidence Intervals for the Mean Difference

Testing the Equality of Variances

Effect of Outliers

Introducing Education

Can You Prove the Null Hypothesis?

Interpreting the Observed Significance Level

Power

Monitoring Death Rates

Does Significant Mean Important?

Summary

What's Next?

How to Obtain an Independent-Samples T Test

Define Groups: Specifying the Subgroups

Options: Confidence Level and Missing Data

Exercises

**15. One-Way Analysis of Variance**

Hours in a Work Week

Describing the Data

Confidence Intervals for the Group Means

Testing the Null Hypothesis

Assumptions Needed for Analysis of Variance

Analyzing the Variability

Comparing the Two Estimates of Variability

The Analysis-of-Variance Table

Multiple Comparison Procedures

Television Viewing, Education, and Internet Use

Summary

What's Next?

How to Obtain a One-Way Analysis of Variance

Post Hoc Multiple Comparisons: Finding the Difference

Options: Statistics and Missing Data

Exercises

**16. Two-Way Analysis of Variance**

The Design

Examining the Data

Testing Hypotheses

Degree and Gender Interaction

Necessary Assumptions

Analysis-of-Variance Table

Testing the Degree-by-Gender Interaction

Testing the Main Effects

Removing the Interaction Effect

Where Are the Differences?

Multiple Comparison Results

Checking Assumptions

A Look at Television

Extensions

Summary

What's Next?

How to Obtain a GLM Univariate Analysis

GLM Univariate: Model

GLM Univariate: Plots

GLM Univariate: Post Hoc

GLM Univariate: Options

GLM Univariate: Save

Exercises

**17. Comparing Observed and Expected Counts**

Freedom or Manners?

Observed and Expected Counts

The Chi-Square Statistic

A Larger Table

Does College Open Doors?

A One-Sample Chi-Square Test

Power Concerns

Summary

What's Next?

Exercises

**18. Nonparametric Tests**

Nonparametric Tests for Paired Data

Sign Test

Wilcoxon Test

Who's Sending E-mail?

Mann-Whitney Test

Kruskal-Wallis Test

Friedman Test

Summary

How to Obtain Nonparametric Tests

Chi-Square Test

Binomial Test

Two-Independent-Samples Tests

Several-Independent-Samples Tests

Two-Related-Samples Tests

Several-Related-Samples Tests

Options: Descriptive Statistics and Missing Values

Exercises

**PART 4. EXAMINING RELATIONSHIPS**

**19. Measuring Association**

Components of the Justice System

Proportional Reduction in Error

Measures of Association for Ordinal Variables

Concordant and Discordant Pairs

Measures Based on Concordant and Discordant Pairs

Evaluating the Components

Measuring Agreement

Correlation-Based Measures

Measures Based on the Chi-Square Statistic

Summary

What's Next?

Exercises

**20. Linear Regression and Correlation**

Life Expectancy and Birthrate

Choosing the Best Line

Calculating the Least-Squares Line

Calculating Predicted Values and Residuals

Determining How Well the Line Fits

Explaining Variability

Some Warnings

Summary

What's Next?

How to Obtain a Linear Regression

Statistics: Further Information on the Model

Residual Plots: Basic Residual Analysis

Linear Regression Save: Creating New Variables

Linear Regression Options

Exercises

**21. Testing Regression Hypotheses**

The Population Regression Line

Assumptions Needed for Testing Hypotheses

Testing Hypotheses

Testing that the Slope Is Zero

Confidence Intervals for the Slope and Intercept

Predicting Life Expectancy

Predicting Means and Individual Observations

Standard Error of the Predicted Mean

Confidence Intervals for the Predicted Means

Prediction Intervals for Individual Cases

Summary

What's Next?

How to Obtain a Bivariate Correlation

Options: Additional Statistics and Missing Data

How to Obtain a Partial Correlation

Options: Additional Statistics and Missing Data

Exercises

**22. Analyzing Residuals**

Residuals

Standardized Residuals

Studentized Residuals

Checking for Normality

Checking for Constant Variance

Checking Linearity

Checking Independence

A Final Comment on Assumptions

Looking for Influential Points

Studentized Deleted Residuals

Summary

What's Next?

Exercises

**23. Building Multiple Regression Models**

Predicting Life Expectancy

The Model

Assumptions for Multiple Regression

Examining the Variables

Looking at How Well the Model Fits

Examining the Coefficients

Interpreting the Partial Regression Coefficients

Changing the Model

Partial Correlation Coefficients

Tolerance and Multicollinearity

Beta Coefficients

Building a Regression Model

Methods for Selecting Variables

Summary

What's Next?

How to Obtain a Multiple Linear Regression

Options: Variable Selection Criteria

Exercises

**24. Multiple Regression Diagnostics**

Examining Normality

Scatterplots of Residuals

Leverage

Changes in the Coefficients

Cook's Distance

Plots against Independent Variables

Partial Regression Plot

Why Bother?

Summary

Exercises

**Appendices**

**A. Obtaining Charts in IBM SPSS Statistics**

Overview

Creating Bar Charts

Creating a Bar Chart for Single Variable

Creating a Clustered Bar Chart

Creating a Chart with Multiple Variables

Modifying Charts

Collapsing Pie Chart Slices

Changing the Scale of Histogram

Saving Chart Files

**B. Transforming and Selecting Data**

Data Transformations

Transformations at a Glance

Saving Changes

Delaying Processing of Transformations

Recoding Values

Computing Variables

The Calculator Pad

Automatic Recoding

Conditional Transformations

Case Selection

Temporary or Permanent Selection

Other Selection Methods

**C. The T Distribution**

**D. Areas under the Normal Curve**

**E. Descriptions of Data Files**

**F. Answers to Selected Exercises**

For more detailed information about Dr. Norušis and her SPSS guides, visit her website at www.norusis.com .

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