Solution Manual for Elementary Statistics, 13th Edition

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SOLUTIONS MANUAL
JAMES LAPP
Colorado Mesa University
E LEMENTARY S TATISTICS
THIRTEENTH EDITION
Mario F. Triola

CONTENTS
Chapter 1: Introduction To Statistics
Section 1-1: Statistical and Critical Thinking...................................................................1
Section 1-2: Types of Data ...............................................................................................3
Section 1-3: Collecting Sample Data................................................................................3
Chapter Quick Quiz ..........................................................................................................5
Review Exercises ..............................................................................................................5
Cumulative Review Exercises ..........................................................................................6
Chapter 2: Exploring Data with Tables and Graphs
Section 2-1: Frequency Distributions for Organizing and Summarizing Data.................7
Section 2-2: Histograms..................................................................................................12
Section 2-3: Graphs That Enlighten and Graphs That Deceive......................................14
Section 2-4: Scatterplots, Correlation, and Regression ..................................................17
Chapter Quick Quiz ........................................................................................................18
Review Exercises ............................................................................................................19
Cumulative Review Exercises ........................................................................................20
Chapter 3: Describing, Exploring, and Comparing Data
Section 3-1: Measures of Center.....................................................................................21
Section 3-2: Measures of Variation ................................................................................26
Section 3-3: Measures of Relative Standing and Boxplots.............................................31
Chapter Quick Quiz ........................................................................................................34
Review Exercises ............................................................................................................35
Cumulative Review Exercises ........................................................................................36
Chapter 4: Probability
Section 4-1: Basic Concepts of Probability ....................................................................37
Section 4-2: Addition Rule and Multiplication Rule ......................................................39
Section 4-3: Complements, Conditional Probability, and Bayes’ Theorem...................41
Section 4-4: Counting .....................................................................................................43
Chapter Quick Quiz ........................................................................................................45
Review Exercises ............................................................................................................46
Cumulative Review Exercises ........................................................................................47
Chapter 5: Discrete Probability Distributions
Section 5-1: Probability Distributions ............................................................................49
Section 5-2: Binomial Probability Distributions.............................................................51
Section 5-3: Poisson Probability Distributions ...............................................................54
Chapter Quick Quiz ........................................................................................................55
Review Exercises ............................................................................................................56
Cumulative Review Exercises ........................................................................................57

Chapter 6: Normal Probability Distributions
Section 6-1: The Standard Normal Distribution .............................................................59
Section 6-2: Real Applications of Normal Distributions................................................60
Section 6-3: Sampling Distributions and Estimators ......................................................64
Section 6-4: The Central Limit Theorem........................................................................68
Section 6-5: Assessing Normality...................................................................................71
Section 6-6: Normal as Approximation to Binomial ......................................................75
Chapter Quick Quiz ........................................................................................................77
Review Exercises ............................................................................................................78
Cumulative Review Exercises ........................................................................................79
Chapter 7: Estimating Parameters and Determining Sample Sizes
Section 7-1: Estimating a Population Proportion............................................................81
Section 7-2: Estimating a Population Mean....................................................................85
Section 7-3: Estimating a Population Standard Deviation or Variance..........................89
Section 7-4: Bootstrapping: Using Technology for Estimates .......................................92
Chapter Quick Quiz ........................................................................................................94
Review Exercises ............................................................................................................95
Cumulative Review Exercises ........................................................................................96
Chapter 8: Hypothesis Testing
Section 8-1: Basics of Hypothesis Testing .....................................................................97
Section 8-2: Testing a Claim About a Proportion...........................................................99
Section 8-3: Testing a Claim About a Mean.................................................................105
Section 8-4: Testing a Claim About a Standard Deviation or Variance .......................109
Chapter Quick Quiz ......................................................................................................112
Review Exercises ..........................................................................................................112
Cumulative Review Exercises ......................................................................................113
Chapter 9: Chapter 9: Inferences from Two Samples
Section 9-1: Two Proportions .......................................................................................115
Section 9-2: Two Means: Independent Samples...........................................................124
Section 9-3: Two Dependent Samples (Matched Pairs) ...............................................130
Section 9-4: Two Variances or Standard Deviations....................................................134
Chapter Quick Quiz ......................................................................................................136
Review Exercises ..........................................................................................................137
Cumulative Review Exercises ......................................................................................138
Chapter 10: Correlation and Regression
Section 10-1: Correlation..............................................................................................141
Section 10-2: Regression ..............................................................................................148
Section 10-3: Prediction Intervals and Variation..........................................................157
Section 10-4: Multiple Regression................................................................................159
Section 10-5: Nonlinear Regression .............................................................................161
Chapter Quick Quiz ......................................................................................................165
Review Exercises ..........................................................................................................165
Cumulative Review Exercises ......................................................................................166

Chapter 11: Goodness-of-Fit and Contingency Tables
Section 11-1: Goodness-of-Fit......................................................................................169
Section 11-2: Contingency Tables ................................................................................173
Chapter Quick Quiz ......................................................................................................177
Review Exercises ..........................................................................................................178
Cumulative Review Exercises ......................................................................................179
Chapter 12: Analysis of Variance
Section 12-1: One-Way ANOVA .................................................................................181
Section 12-2: Two-Way ANOVA ................................................................................183
Chapter Quick Quiz ......................................................................................................184
Review Exercises ..........................................................................................................185
Cumulative Review Exercises ......................................................................................186
Chapter 13: Nonparametric Tests
Section 13-2: Sign Test.................................................................................................189
Section 13-3: Wilcoxon Signed-Ranks Test for Matched Pairs ...................................190
Section 13-4: Wilcoxon Rank-Sum Test for Two Independent samples......................192
Section 13-5: Kruskal-Wallis Test for Three or More Samples ...................................195
Section 13-6: Rank Correlation ....................................................................................196
Section 13-7: Runs Test for Randomness.....................................................................198
Chapter Quick Quiz ......................................................................................................199
Review Exercises ..........................................................................................................200
Cumulative Review Exercises ......................................................................................201
Chapter 14: Statistical Process Control
Section 14-1: Control Charts for Variation and Mean..................................................203
Section 14-2: Control Charts for Attributes..................................................................205
Chapter Quick Quiz ......................................................................................................210
Review Exercises ..........................................................................................................210
Cumulative Review Exercises ......................................................................................212

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