condition mean min max ZT0-3 0.132385731 0.12321075899999999 0.141560703 ZT4-7 0.0240678665 0.018005530500000002 0.0301302025 ZT8-11 0.01795415 0.0066472944999999995 0.0292610055 ZT12-15 2.61078048675 1.3154233555 3.906137618 ZT16-19 3.3469757739999997 2.9441938954999998 3.7497576524999996 ZT20-23 1.6920611005000001 1.4224194985 1.9617027025