condition mean min max ZT0-3 0.200615 0.180731 0.220499 ZT4-7 0.18249849999999998 0.18249849999999998 0.18249849999999998 ZT8-11 0.13656605 0.13656605 0.13656605 ZT12-15 0 0 0 ZT16-19 0.31052484999999996 0.31052484999999996 0.31052484999999996 ZT20-23 0.401261 0.401261 0.401261