condition mean min max ZT0-3 0.042711165 0.0 0.08542233 ZT4-7 0.07455639474999999 0.0 0.14911278949999998 ZT8-11 0.1471030975 0.13902412 0.155182075 ZT12-15 0.5825979155000001 0.519293768 0.6459020630000001 ZT16-19 0.88658827725 0.8369427875 0.936233767 ZT20-23 0.2679672855 0.233327712 0.302606859