John Benjamins Publishing Company
Chapter 5. Comparing two groups
Abstract
Do language learners who are taught by an innovative method show better results than those who are taught traditionally? Do speakers of one language variety speak faster than speakers of another variety? Do people of one gender use more hedging constructions than people of another? In this chapter, you will learn how to make such comparisons using the parametric t-test and the non-parametric Wilcoxon and Mann-Whitney tests for dependent and independent samples. You will learn how to compute the standard error and confidence intervals for the mean. The case studies will involve differences between high- and low-frequency nouns with regard to the number of associations that they trigger and their abstractness/concreteness scores.
Abstract
Do language learners who are taught by an innovative method show better results than those who are taught traditionally? Do speakers of one language variety speak faster than speakers of another variety? Do people of one gender use more hedging constructions than people of another? In this chapter, you will learn how to make such comparisons using the parametric t-test and the non-parametric Wilcoxon and Mann-Whitney tests for dependent and independent samples. You will learn how to compute the standard error and confidence intervals for the mean. The case studies will involve differences between high- and low-frequency nouns with regard to the number of associations that they trigger and their abstractness/concreteness scores.
Chapters in this book
- Prelim pages i
- Table of contents vii
- Acknowledgements xi
- Introduction 1
- Chapter 1. What is statistics? 7
- Chapter 2. Introduction to R 21
- Chapter 3. Descriptive statistics for quantitative variables 41
- Chapter 4. How to explore qualitative variables 69
- Chapter 5. Comparing two groups 87
- Chapter 6. Relationships between two quantitative variables 115
- Chapter 7. More on frequencies and reaction times 139
- Chapter 8. Finding differences between several groups 171
- Chapter 9. Measuring associations between two categorical variables 199
- Chapter 10. Association measures 223
- Chapter 11. Geographic variation of quite: Distinctive collexeme analysis 241
- Chapter 12. Probabilistic multifactorial grammar and lexicology 253
- Chapter 13. Multinomial (polytomous) logistic regression models of three and more near synonyms 277
- Chapter 14. Conditional inference trees and random forests 291
- Chapter 15. Behavioural profiles, distance metrics and cluster analysis 301
- Chapter 16. Introduction to Semantic Vector Spaces 323
- Chapter 17. Language and space 333
- Chapter 18. Multidimensional analysis of register variation 351
- Chapter 19. Exemplars, categories, prototypes 367
- Chapter 20. Constructional change and motion charts 387
- Epilogue 395
- The most important R objects and basic operations with them 397
- Main plotting functions and graphical parameters in R 409
- References 425
- Subject Index 433
- Index of R functions and packages 441
Chapters in this book
- Prelim pages i
- Table of contents vii
- Acknowledgements xi
- Introduction 1
- Chapter 1. What is statistics? 7
- Chapter 2. Introduction to R 21
- Chapter 3. Descriptive statistics for quantitative variables 41
- Chapter 4. How to explore qualitative variables 69
- Chapter 5. Comparing two groups 87
- Chapter 6. Relationships between two quantitative variables 115
- Chapter 7. More on frequencies and reaction times 139
- Chapter 8. Finding differences between several groups 171
- Chapter 9. Measuring associations between two categorical variables 199
- Chapter 10. Association measures 223
- Chapter 11. Geographic variation of quite: Distinctive collexeme analysis 241
- Chapter 12. Probabilistic multifactorial grammar and lexicology 253
- Chapter 13. Multinomial (polytomous) logistic regression models of three and more near synonyms 277
- Chapter 14. Conditional inference trees and random forests 291
- Chapter 15. Behavioural profiles, distance metrics and cluster analysis 301
- Chapter 16. Introduction to Semantic Vector Spaces 323
- Chapter 17. Language and space 333
- Chapter 18. Multidimensional analysis of register variation 351
- Chapter 19. Exemplars, categories, prototypes 367
- Chapter 20. Constructional change and motion charts 387
- Epilogue 395
- The most important R objects and basic operations with them 397
- Main plotting functions and graphical parameters in R 409
- References 425
- Subject Index 433
- Index of R functions and packages 441