condition mean min max ZT0-3 0.19103286666666666 0.0928825 0.2912325 ZT4-7 0.13965095 0.13965095 0.13965095 ZT8-11 0.23901899999999998 0.23901899999999998 0.23901899999999998 ZT12-15 0.6429365 0.596873 0.6890000000000001 ZT16-19 0.8668035000000001 0.8668035000000001 0.8668035000000001 ZT20-23 0.6722839999999999 0.6722839999999999 0.6722839999999999