内容简介：
Description
You're being asked to quantify usability improvements with statistics. But even with a background in statistics, you are hesitant to statistically analyze the data, as you may be unsure about which statistical tests to use and have trouble defending the use of the small test sample sizes associated with usability studies.
作者简介：
Jeff Sauro, Jeff Sauro, M.A., Measuring Usability LLC, Usability Metrics and Statistical Analyst
James Lewis, James R. Lewis, PhD, Senior Human Factors Engineer, IBM
目录：
Dedication
Acknowledgements
About the Authors
Chapter 1: Introduction and How to Use This Book
Chapter 2: Quantifying User Research
Chapter 3: How Precise Are Our Estimates? Confidence Intervals
Chapter 4: Did We Meet or Exceed Our Goal?
Chapter 5: Is There a Statistical Difference between Designs?
Chapter 6: What Sample Sizes Do We Need? Part 1: Summative Studies
Chapter 7: What Sample Sizes Do We Need? Part 2: Formative Studies
Chapter 8: Standard Usability Questionnaires
Chapter 9: Six Enduring Controversies in Measurement and Statistics
Chapter 10: Wrapping Up
Appendix
Index