condition mean min max ZT0-3 0.0026720833333333336 0.0026720833333333336 0.0026720833333333336 ZT4-7 0.010519774999999999 0.010519774999999999 0.010519774999999999 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0266343 0.0266343 0.0266343