condition mean min max ZT0-3 902.8191666666667 792.491 977.8499999999999 ZT4-7 746.9145 746.9145 746.9145 ZT8-11 956.4675 956.4675 956.4675 ZT12-15 1726.615 1601.045 1852.185 ZT16-19 1700.185 1700.185 1700.185 ZT20-23 844.944 844.944 844.944