The preface says "The book is organized into five main sections, mirroring the timeline of an experiment: 1) Foundations, 2) Statistics, 3) Design, 4) Execution, and 5) Reporting." whereas the left-bar menu has "Planning" instead of "Design", probably because a lower level heading is called "Design" (chapter 9). Using "3) Planning" might be more elegant than the current "3) Design". Nothing major, obviously.
The preface says "The book is organized into five main sections, mirroring the timeline of an experiment: 1) Foundations, 2) Statistics, 3) Design, 4) Execution, and 5) Reporting." whereas the left-bar menu has "Planning" instead of "Design", probably because a lower level heading is called "Design" (chapter 9). Using "3) Planning" might be more elegant than the current "3) Design". Nothing major, obviously.