condition mean min max ZT0-3 387.20974875 377.9538524 396.4656451 ZT4-7 398.31040571666665 381.2873844 415.33342703333335 ZT8-11 379.16527494999997 378.20730729999997 380.12324259999997 ZT12-15 546.5947848000001 462.71956650000004 630.4700031 ZT16-19 711.4762873166667 703.8461811333333 719.1063935 ZT20-23 722.9862311833333 691.7698417666667 754.2026205999999