ll Chapter 2 -Key terms Frequency distribution Class- The category Frequency - Number in each class Class limits- Boundaries for each class Class interval-Width of each class Class mark - Midpoint of each class o 2002 The Wadsworth GroupChapter 2 - Key Terms • Frequency Distribution – Class - The category – Frequency - Number in each class – Class limits - Boundaries for each class – Class interval - Width of each class – Class mark - Midpoint of each class © 2002 The Wadsworth Group