Mean (arithmetic, geometric, harmonic)
Descriptive statistics · Mathematics
Study notes
Q: Find AM, GM, HM of 4 and 9. AM = (4+9)/2 = 6.5. GM = sqrt(4 times 9) = sqrt(36) = 6. HM = 2/(1/4 + 1/9) = 2/(13/36) = 72/13 = 5.54. Check: 6.5 >= 6 >= 5.54. AM >= GM >= HM holds!