condition mean min max ZT0-3 0.6769108333333334 0.0 1.0273025 ZT4-7 0.958115 0.958115 0.958115 ZT8-11 0.3364775 0.3364775 0.3364775 ZT12-15 0.50957575 0.3646915 0.65446 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0