Ch 4 · Measures of Central Tendency & Dispersion

5 concept points · 6 formulas · 4 exam-critical points.

⭐ Important points (exam-critical)

• ⭐AM ≥ GM ≥ HM for positive numbers (equality when all equal).
• ⭐SD unaffected by change of origin, affected by change of scale.
• ⭐For symmetrical distribution: Mean = Median = Mode.
• ⭐CV used to compare variability of two datasets with different units.