condition mean min max ZT0-3 91.09108359999999 87.59812342 94.58404378 ZT4-7 41.22805332750001 36.588002635 45.868104020000004 ZT8-11 20.320792672499998 16.924147275 23.71743807 ZT12-15 31.6520683835 21.812661142 41.491475625 ZT16-19 60.66259583750001 57.41499447 63.910197205 ZT20-23 100.2527025075 76.43598391500001 124.0694211