condition mean min max ZT0-3 337.55 337.55 337.55 ZT4-7 517.1 517.1 517.1 ZT8-11 440.5 440.5 440.5 ZT12-15 446.29999999999995 446.29999999999995 446.29999999999995 ZT16-19 456.4 456.4 456.4 ZT20-23 390.25 390.25 390.25