condition mean min max ZT0-3 0.6003788333333333 0.3347595 1.0960285 ZT4-7 0.123854 0.123854 0.123854 ZT8-11 0.2510535 0.2510535 0.2510535 ZT12-15 0.7483115 0.581139 0.915484 ZT16-19 1.0721375 1.0721375 1.0721375 ZT20-23 0.871629 0.871629 0.871629