Session Unit 2: 8. Statistical Concepts and Market Returns (A/B) A. (15% + 19% + (–8%) + 14%) / 4 = 10% B. (1.15 × 1.19 × 0.92 × 1.14)0.25 – 1 = 9.45% Concept Checkers, p.160/ Challenge Problems p. 163