Mathematical Statistics with Applications 8th edition

Textbook Cover

Dennis D. Wackerly, John Tuhao Chen, and Adam Loy
Publisher: Cengage Learning

lifetime of edition

Lifetime of Edition (LOE)

Your students are allowed unlimited access to WebAssign courses that use this edition of the textbook at no additional cost.

course pack

Course Packs

Save time with ready-to-use assignments built by subject matter experts specifically for this textbook. You can customize and schedule any of the assignments you want to use.


  • Wackerly Mathematical Statistics with Applications 8e
  • Wackerly Mathematical Statistics with Applications with R 8e

Access is contingent on use of this textbook in the instructor's classroom.

  • Chapter 1: What Is Statistics?
    • 1: Concept Explorations
    • 1: Precalculus Review
    • 1.1: Population and Data
    • 1.2: Characterizing a Set of Measurements: Graphical Methods
    • 1.3: Characterizing a Set of Measurements: Numerical Methods
    • 1.4: Making Statistical Inference
    • 1: Supplementary Exercises

  • Chapter 2: Probability
    • 2: Concept Explorations
    • 2: Precalculus Review
    • 2.1: Interpreting Probabilities
    • 2.2: A Review of Set Notation
    • 2.3: A Probabilistic Model for an Experiment: The Discrete Case
    • 2.4: Calculating the Probability of an Event: The Sample-Point Method
    • 2.5: Tools for Counting Sample Points
    • 2.6: Conditional Probability and the Independence of Events
    • 2.7: Two Laws of Probability
    • 2.8: Calculating the Probability of an Event: The Event-Composition Method
    • 2.9: The Law of Total Probability and Bayes' Rule
    • 2: Supplementary Exercises

  • Chapter 3: Discrete Random Variables and Their Probability Distributions
    • 3: Concept Explorations
    • 3: Precalculus and Calculus Review
    • 3.1: Random Variables
    • 3.2: The Probability Distribution for a Discrete Random Variable
    • 3.3: The Expected Value of a Random Variable or a Function of a Random Variable
    • 3.4: The Bernoulli and Binomial Probability Distributions
    • 3.5: The Geometric Probability Distribution
    • 3.6: The Negative Binomial Probability Distribution (Optional)
    • 3.7: The Hypergeometric Probability Distribution
    • 3.8: The Poisson Probability Distribution
    • 3.9: Moments and Moment-Generating Functions
    • 3.10: Chebyshev's Inequality for Discrete Random Variables
    • 3: Supplementary Exercises

  • Chapter 4: Continuous Variables and Their Probability Distributions
    • 4: Concept Explorations
    • 4: Calculus Review
    • 4.1: The Probability Distribution for a Continuous Random Variable
    • 4.2: Expected Values for Continuous Random Variables
    • 4.3: The Uniform Probability Distribution
    • 4.4: The Normal Probability Distribution
    • 4.5: The Gamma Probability Distribution
    • 4.6: The Beta Probability Distribution
    • 4.7: Moments and Moment-Generating Functions for Continuous Random Variables
    • 4.8: Chebyshev's Inequality for Continuous Random Variables
    • 4.9: Expectations of Discontinuous Functions and Mixed Probability Distributions (Optional)
    • 4: Supplementary Exercises

  • Chapter 5: Multivariate Probability Distributions
    • 5: Concept Explorations
    • 5: Precalculus and Calculus Review
    • 5.1: Bivariate and Multivariate Probability Distributions
    • 5.2: Marginal and Conditional Probability Distributions
    • 5.3: Independent Random Variables
    • 5.4: The Expected Value of a Function of Random Variables
    • 5.5: The Covariance of Two Random Variables
    • 5.6: The Expected Value and Variance of Linear Functions of Random Variables
    • 5.7: The Multinomial Probability Distribution
    • 5.8: The Bivariate Normal Distribution (Optional)
    • 5.9: Conditional Expectations
    • 5: Supplementary Exercises

  • Chapter 6: Functions of Random Variables
    • 6: Concept Explorations
    • 6: Precalculus and Calculus Review
    • 6.1: Transformations Using the Cumulative Distribution Function
    • 6.2: Density Transformations via Change of Variables
    • 6.3: Transformations of Moment-Generating Functions
    • 6.4: Multivariate Transformations (Optional)
    • 6: Supplementary Exercises

  • Chapter 7: Sampling Distributions
    • 7: Concept Explorations
    • 7: Precalculus Review
    • 7.1: Basic Sampling Statistics
    • 7.2: Sampling Distributions Related to Normal Data
    • 7.3: The Central Limit Theorem
    • 7.4: A Proof of the Central Limit Theorem (Optional)
    • 7.5: The Normal Approximation to the Binomial Distribution
    • 7.6: Order Statistics
    • 7: Supplementary Exercises
    • 7: Labs

  • Chapter 8: Estimation
    • 8: Concept Explorations
    • 8: Precalculus and Calculus Review
    • 8.1: The Bias and Mean Square Error of Point Estimators
    • 8.2: Unbiased Point Estimators on Mean and Proportions
    • 8.3: Confidence Intervals
    • 8.4: Large-Sample Confidence Intervals
    • 8.5: Selecting the Sample Size
    • 8.6: Small-Sample Confidence Intervals for μ and μ1μ2
    • 8.7: Confidence Intervals for σ2
    • 8: Supplementary Exercises

  • Chapter 9: Properties of Point Estimators
    • 9: Concept Explorations
    • 9: Precalculus and Calculus Review
    • 9.1: Relative Efficiency
    • 9.2: Consistency
    • 9.3: Sufficiency
    • 9.4: Uniformly Minimum Variance Unbiased Estimators
    • 9.5: The Method of Moments
    • 9.6: The Method of Maximum Likelihood
    • 9.7: Large-Sample Confidence Intervals Based on Maximum-Likelihood Estimators (Optional)
    • 9: Supplementary Exercises

  • Chapter 10: Hypothesis Testing
    • 10: Concept Explorations
    • 10: Precalculus Review
    • 10.1: Elements of a Statistical Test
    • 10.2: Common Large-Sample Tests
    • 10.3: Calculating Type II Error Probabilities and Finding the Sample Size for Z Tests
    • 10.4: Relationships Between Hypothesis-Testing Procedures and Confidence Intervals
    • 10.5: Another Way to Report the Results of a Statistical Test: p-Values
    • 10.6: Some Comments on the Theory of Hypothesis Testing
    • 10.7: Small-Sample Hypothesis Testing for μ and μ1μ2
    • 10.8: Testing Hypotheses Concerning Variances
    • 10.9: Power of Tests and the Neyman–Pearson Lemma
    • 10.10: Likelihood Ratio Tests
    • 10: Supplementary Exercises

  • Chapter 11: Linear Models and Estimation by Least Squares
    • 11: Concept Explorations
    • 11: Precalculus and Calculus Review
    • 11.1: Linear Statistical Models
    • 11.2: The Method of Least Squares
    • 11.3: Properties of the Least-Squares Estimators: Simple Linear Regression
    • 11.4: Inferences Concerning the Parameters βi
    • 11.5: Inferences Concerning Linear Functions of the Model Parameters: Simple Linear Regression
    • 11.6: Predicting a Particular Value of Y by Using Simple Linear Regression
    • 11.7: Checking Model Assumptions
    • 11.8: Correlation
    • 11.9: Transformations
    • 11.10: Fitting the Linear Model by Using Matrices
    • 11.11: Linear Functions of the Model Parameters: Multiple Linear Regression
    • 11.12: Inferences Concerning Linear Functions of the Model Parameters: Multiple Linear Regression
    • 11.13: Predicting a Particular Value of Y by Using Multiple Regression
    • 11.14: A Test for H0 : βg + 1 = βg + 2 = … = βk = 0
    • 11: Supplementary Exercises

  • Chapter 12: Experimental Designs
    • 12: Concept Explorations
    • 12: Precalculus Review
    • 12.1: Sampling Information
    • 12.2: Designing Experiments to Increase Accuracy
    • 12.3: The Matched-Pairs Experiment
    • 12.4: Some Elementary Experimental Designs
    • 12: Supplementary Exercises

  • Chapter 13: The Analysis of Variance
    • 13: Concept Explorations
    • 13: Precalculus Review
    • 13.1: ANOVA to Compare Two Means
    • 13.2: ANOVA for Three or More Means
    • 13.3: A Statistical Model for the One-Way Layout
    • 13.4: Estimation in the One-Way Layout
    • 13.5: A Statistical Model for the Randomized Block Design
    • 13.6: The Analysis of Variance for a Randomized Block Design
    • 13.7: Estimation in the Randomized Block Design
    • 13.8: Selecting the Sample Size
    • 13.9: Simultaneous Confidence Intervals Using the Bonferroni Adjustment
    • 13.10: Analysis of Variance Using Linear Models
    • 13: Supplementary Exercises
    • 13: Labs

  • Chapter 14: Analysis of Categorical Data
    • 14: Concept Explorations
    • 14: Precalculus and Calculus Review
    • 14.1: The Chi-Square Test
    • 14.2: Chi-Square Test of Independence
    • 14.3: Chi-Square Test of Homogeneity
    • 14.4: Permutation Tests for Small Counts
    • 14: Supplementary Exercises

  • Chapter 15: Nonparametric Statistics
    • 15: Concept Explorations
    • 15: Precalculus Review
    • 15.1: The Sign Test for a Matched-Pairs Experiment
    • 15.2: The Wilcoxon Signed-Rank Test for a Matched-Pairs Experiment
    • 15.3: The Wilcoxon–Mann–Whitney Test Comparing Two Independent Samples
    • 15.4: The Kruskal–Wallis Test for the One-Way Layout
    • 15.5: The Friedman Test for Randomized Block Designs
    • 15.6: The Runs Test: A Test for Randomness
    • 15.7: Rank Correlation Coefficient
    • 15: Supplementary Exercises

  • Chapter 16: Introduction to Bayesian Methods for Inference
    • 16: Concept Explorations
    • 16: Precalculus and Calculus Review
    • 16.1: Bayesian Priors, Posteriors, and Estimators
    • 16.2: Bayesian Credible Intervals
    • 16.3: Bayesian Tests of Hypotheses

  • Chapter PJT: Project
    • PJT.1: Project

Questions Available within WebAssign

Most questions from this textbook are available in WebAssign. The online questions are identical to the textbook questions except for minor wording changes necessary for Web use. Whenever possible, variables, numbers, or words have been randomized so that each student receives a unique version of the question. This list is updated nightly.

Question Availability Color Key
BLACK questions are available now
GRAY questions are under development


Group Quantity Questions
Chapter 1: What Is Statistics?
1 0  
Chapter 2: Probability
2 0  
Chapter 3: Discrete Random Variables and Their Probability Distributions
3 0  
Chapter 4: Continuous Variables and Their Probability Distributions
4 0  
Chapter 5: Multivariate Probability Distributions
5 0  
Chapter 6: Functions of Random Variables
6 0  
Chapter 7: Sampling Distributions
7 0  
Chapter 8: Estimation
8 0  
Chapter 9: Properties of Point Estimators
9 0  
Chapter 10: Hypothesis Testing
10 0  
Chapter 11: Linear Models and Estimation by Least Squares
11 0  
Chapter 12: Experimental Designs
12 0  
Chapter 13: The Analysis of Variance
13 0  
Chapter 14: Analysis of Categorical Data
14 0  
Chapter 15: Nonparametric Statistics
15 0  
Chapter 16: Introduction to Bayesian Methods for Inference
16 0  
Total 0