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| Introduction | |
| Descriptive Statistics | |
| Inferential Statistics | |
| Our Concern: Applied Statistics | |
| Variables and Constants | |
| Scales of Measurement | |
| Scales of Measurement and Problems of Statistical Treatment | |
| Do Statistics Lie? | |
| Point of Controversy: Are Statistical Procedures Necessary? | |
| Some Tips on Studying Sta... MORE | |
| Statistics and Computers | |
| Summary | |
| Frequency Distributions, Percentiles, and Percentile Ranks | |
| Organizing Qualitative Data | |
| Grouped Scores | |
| How to Construct a Grouped Frequency Distribution | |
| Apparent versus Real Limits | |
| The Relative Frequency Distribution | |
| The Cumulative Frequency Distribution | |
| Percentiles and Percentile Ranks | |
| Computing Percentiles from Grouped Data | |
| Computation of Percentile Rank | |
| Summary | |
| Graphic Representation of Frequency Distributions | |
| Basic Procedures | |
| The Histogram | |
| The Frequency Polygon | |
| Choosing between a Histogram and a Polygon | |
| The Bar Diagram and the Pie Chart | |
| The Cumulative Percentage Curve | |
| Factors Affecting the Shape of Graphs | |
| Shape of Frequency Distributions | |
| Summary | |
| Central Tendency | |
| The Mode | |
| The Median | |
| The Mean | |
| Properties of the Mode | |
| Properties of the Mean | |
| Point of Controversy: Is It Permissible to Calculate the Mean for Tests in the Behavioral Sciences? | |
| Properties of the Median | |
| Measures of Central Tendency in Symmetrical and Asymmetrical Distributions | |
| The Effects of Score Transformations | |
| Summary | |
| Variability and Standard (z) Scores | |
| The Range and Semi-Interquartile Range | |
| Deviation Scores | |
| Deviational Measures: The Variance | |
| Deviational Measures: The Standard Deviation | |
| Calculation of the Variance and Standard Deviation: Raw-Score Method | |
| Calculation of the Standard Deviation with IBM SPSS (formerly SPSS) | |
| Point of Controversy: Calculating the Sample Variance: Should We Divide by n or (n - 1)? | |
| Properties of the Range and Semi-Interquartile Range | |
| Properties of the Standard Deviation | |
| How Big Is a Standard Deviation? | |
| Score Transformations and Measures of Variability | |
| Standard Scores (z Scores) | |
| A Comparison of z Scores and Percentile Ranks | |
| Summary | |
| Standard Scores and the Normal Curve | |
| Historical Aspects of the Normal Curve | |
| The Nature of the Normal Curve | |
| Standard Scores and the Normal Curve | |
| The Standard Normal Curve: Finding Areas When the Score Is Known | |
| The Standard Normal Curve: Finding Scores When the Area Is Known | |
| The Normal Curve as a Model for Real Variables | |
| The Normal Curve as a Model for Sampling Distributions | |
| Summary | |
| Point of Controversy: How Normal Is the Normal Curve? | |
| Correlation | |
| Some History | |
| Graphing Bivariate Distributions: The Scatter Diagram | |
| Correlation: A Matter of Direction | |
| Correlation: A Matter of Degree | |
| Understanding the Meaning of Degree of Correlation | |
| Formulas for Pearson's Coefficient of Correlation | |
| Calculating r from Raw Scores | |
| Calculating r with IBM SPSS | |
| Spearman's Rank-Order Correlation Coefficient | |
| Correlation Does Not Prove Causation | |
| The Effects of Score Transformations | |
| Cautions Concerning Correlation Coefficients | |
| Summary | |
| Prediction | |
| The Problem of Prediction | |
| The Criterion of Best Fit | |
| Point of Controversy: Least-Squares Regression versus the Resistant Line | |
| The Regression Equation: Standard-Score Form | |
| The Regression Equation: Raw-Score Form | |
| Error of Prediction: The Standard Error of Estimate | |
| An Alternative (and Preferred) Formula for SYX | |
| Calculating the "Raw-Score" Regression Equation and Standard Error of Estimate with IBM SPSS | |
| Error in Estimating Y from X | |
| Cautions Concerning Estimation of Predictive Error | |
| Prediction Does Not Prove Causation | |
| Summary | |
| Interpretive Aspects of Correlation and Regression | |
| Factors Influencing r: Degree of Variability in Each Variable | |
| Interpretation of r: The Regression Equation I | |
| Interpretation of r: The Regression Equation II | |
| Interpretation of r: Proportion of Variation in Y Not Associated with | |
| Variation in X | |
| Interpretation of r: Proportion of Variation in Y Associated with | |
| Variation in X | |
| Interpretation of r: Proportion of Correct Placements | |
| Summary | |
| Probability | |
| Defining Probability | |
| A Mathematical Model of Probability | |
| Two Theorems in Probability | |
| An Example of a Probability Distribution: The Binomial | |
| Applying the Binomial | |
| Probability and Odds | |
| Are Amazing Coincidences Really That Amazing? | |
| Summary | |
| Random Sampling and Sampling Distributions | |
| Random Sampling | |
| Using a Table of Random Numbers | |
| The Random Sampling Distribution of the Mean: An Introduction | |
| Characteristics of the Random Sampling Distribution of the Mean | |
| Using the Sampling Distribution of X to Determine the Probability for Different Ranges of Values of X | |
| Random Sampling Without Replacement | |
| Summary | |
| Introduction to Statistical Inference: Testing Hypotheses about Single Means (z and t) | |
| Testing a Hypothesis about a Single Mean | |
| The Null and Alternative Hypotheses | |
| When Do We Retain and When Do We Reject the Null Hypothesis? | |
| Review of the Procedure for Hypothesis Testing | |
| Dr. Brown's Problem: Conclusion | |
| The Statistical Decision | |
| Choice of HA: One-Tailed and Two-Tailed Tests | |
| Review of Assumptions in Testing Hypotheses about a Single Mean | |
| Point of Controversy: The Single-Subject Research Design | |
| Estimating the Standard Error of the Mean When ¿ Is Unknown | |
| The t Distribution | |
| Characteristics of Student's Distribution of t | |
| Degrees of Freedom and Student's Distribution of t | |
| An Example: Has the Violent Content of Television Programs Increased? | |
| Calculating t from Raw Scores | |
| Calculating t with IBM SPSS | |
| Levels of Significance versus p-Values | |
| Summary | |
| Interpreting the Results of Hypothesis Testing: Effect Size, Type I and Type II Errors, and Power | |
| A Statistically Significant Difference versus a Practically Important Difference | |
| Point of Controversy: The Failure to Publish "Nonsignificant" Results | |
| Effect Size | |
| Errors in Hypothesis Testing | |
| The Power of a Test | |
| Factors Affecting Power: Difference between the True Population Mean and the Hypothesized Mean (Size of Effect) | |
| Factors Affecting Power: Sample Size | |
| Factors Affecting Power:Variability of the Measure | |
| Factors Affecting Power: Level of Significance (¿) | |
| Factors Affecting Power: One-Tailed versus Two-Tailed Tests | |
| Calculating the Power of a Test | |
| Point of Controversy: Meta-Analysis | |
| Estimating Power and Sample Size for Tests of Hypotheses about Means | |
| Problems in Selecting a Random Sample and in Drawing Conclusions | |
| Summary | |
| Testing Hypotheses about the Difference between Two Independent Groups | |
| The Null and Alternative Hypotheses | |
| The Random Sampling Distribution of the Difference between Two Sample Means | |
| Properties of the Sampling Distribution of the Difference between Means | |
| Determining a Formula for t | |
| Testing the Hypothesis of No Difference between Two Independent Means: The Dyslexic Children Experiment | |
| Use of a One-Tailed Test | |
| Calculation of t with IBM SPSS | |
| Sample Size in Inference about Two Means | |
| Effect Size | |
| Estimating Power and Sample Size for Tests of Hypotheses about the Difference between Two Independent Means | |
| Assumptions Associated with Inference about the Difference between Two Independent Means | |
| The Random-Sampling Model versus the Random-Assignment Model | |
| Random Sampling and Random Assignment as Experimental Controls | |
| Summary | |
| Testing for a Difference between Two Dependent (Correlated) Groups | |
| Determining a Formula for t | |
| Degrees of Freedom for Tests of No Difference between Dependent Means | |
| An Alternative Approach to the Problem of Two Dependent Means | |
| Testing a Hypothesis about Two Dependent Means: Does Text Messaging Impair Driving? | |
| Calculating t with IBM SPSS | |
| Effect Size | |
| Power | |
| Assumptions When Testing a Hypothesis about the Difference between Two Dependent Means | |
| Problems with Using the Dependent-Samples Design | |
| Summary | |
| Inference about Correlation Coefficients | |
| The Random Sampling Distribution of r | |
| Testing the Hypothesis that r = 0 | |
| Fisher's z' Transformation | |
| Strength of Relationship | |
| A Note about Assumptions | |
| Inference When Using Spearman's rS | |
| Summary | |
| An Alternative to Hypothesis Testing: Confidence Intervals | |
| Examples of Estimation | |
| Confidence Intervals for ¿X | |
| The Relation between Confidence Intervals and Hypothesis Testing | |
| The Advantages of Confidence Intervals | |
| Random Sampling and Generalizing Results | |
| Evaluating a Confidence Interval | |
| Point of Controversy: Objectivity and Subjectivity in Inferential Statistics: Bayesian Statistics | |
| Confidence Intervals for ¿X - ¿Y | |
| Sample Size Required for Confidence Intervals of ¿X and ¿X - ¿Y | |
| Confidence Intervals for ¿ | |
| Where are We in Statistical Reform? | |
| Summary | |
| Testing for Differences among Three or More Groups: One-Way Analysis of Variance (and Some Alternatives) | |
| The Null Hypothesis | |
| The Basis of One-Way Analysis of Variance:Variation within and between Groups | |
| Partition of the Sums of Squares | |
| Degrees of Freedom | |
| Variance Estimates and the F Ratio | |
| The Summary Table | |
| Example: Does Playing Violent Video Games Desensitize People to Real-Life Aggression? | |
| Comparison of t and F | |
| Raw-Score Formulas for Analysis of Variance | |
| Calculation of ANOVA for Independent Measures with IBM SPSS | |
| Assumptions Associated with ANOVA | |
| Effect Size | |
| ANOVA and Power | |
| Post Hoc Comparisons | |
| Some Concerns about Post Hoc Comparisons | |
| An Alternative to the F Test: Planned Comparisons | |
| How to Construct Planned Comparisons | |
| Analysis of Variance for Repeated Measures | |
| Calculation of ANOVA for Repeated Measures with IBM SPSS | |
| Summary | |
| Factorial Analysis of Variance: The Two-Factor Design | |
| Main Effects | |
| Interaction | |
| The Importance of Interaction | |
| Partition of the Sums of Squares for Two-Way ANOVA | |
| Degrees of Freedom | |
| Variance Estimates and F Tests | |
| Studying the Outcome of Two-Factor Analysis of Variance | |
| Effect Size | |
| Calculation of Two-Factor ANOVA with IBM SPSS | |
| Planned Comparisons | |
| Assumptions of the Two-Factor Design and the Problem of Unequal Numbers of Scores | |
| Mixed Two-Factor Within-Subjects Design | |
| Calculation of the Mixed Two-Factor Within-Subjects Design with IBM SPSS | |
| Summary | |
| Chi-Square and Inference about Frequencies | |
| The Chi-Squre Test for Goodness of Fit | |
| Chi-Square (¿2) as a Measure of the Difference between Observed and Expected Frequencies | |
| The Logic of the Chi-Square Test | |
| Interpretation of the Outcome of a Chi-Square Test | |
| Different Hypothesized Proportions in the Test for Goodness of Fit | |
| Effect Size for Goodness-of-Fit Problems | |
| Assumptions in the Use of the Theoretical Distribution of Chi-Square | |
| Chi-Square as a Test for Independence between Two Variables | |
| Finding Expected Frequencies in a Contingency Table | |
| Calculation of ¿2 and Determination of Significance in a Contingency Table | |
| Measures of Effect Size (Strength of Association) for Tests of Independence | |
| Point of Controversy: Yates' Correction for Continuity | |
| Power and the Chi-Square Test of Independence | |
| Summary | |
| Some (Almost) Assumption-Free Tests | |
| The Null Hypothesis in Assumption-Freer Tests | |
| Randomization Tests | |
| Rank-Order Tests | |
| The Bootstrap Method of Statistical Inference | |
| An Assumption-Freer Alternative to the t Test of a Difference between Two Independent Groups: The Mann-Whitney U Test | |
| Point of Controversy: A Comparison of the t Test and Mann-Whitney U Test with Real-World Distributions | |
| An Assumption-Freer Alternative to the t Test of a Difference between Two Dependent Groups: The Sign Test | |
| Another Assumption-Freer Alternative to the t Test of a Difference between Two Dependent Groups: The Wilcoxon Signed-Ranks Test | |
| An Assumption-Freer Alternative to One-Way ANOVA for Independent Groups: The Kruskal-Wallis Test | |
| An Assumption-Freer Alternative to ANOVA for Repeated Measures: | |
| Friedman's Rank Test for Correlated Samples | |
| Summary | |
| Review of Basic Mathematics | |
| List of Symbols | |
| Answers to Problems | |
| Statistical Tables | |
| Areas under the Normal Curve Corresponding to Given Values of z | |
| The Binomial Distribution | |
| Random Numbers | |
| Student's t Distribution | |
| The F Distribution | |
| The Studentized Range Statistic | |
| Values of the Correlation Coefficient Required for Different Levels of Significance When H0: r= 0 | |
| Values of Fisher's z' for Values of r | |
| The ¿2 Distribution | |
| Critical One-Tail Values of SRX for the Mann-Whitney U Test | |
| Critical Values for the Smaller of R+ or R- for the Wilcoxon Signed-Ranks Test | |
| Epilogue: The Realm of Statistics | |
| ReferenceS | |
| Index | |
| Table of Contents provided by Publisher. All Rights Reserved. |