condition mean min max ZT0-3 60.139849999999996 39.2223 81.0574 ZT4-7 15.94135 15.94135 15.94135 ZT8-11 14.1978 14.1978 14.1978 ZT12-15 0 0 0 ZT16-19 15.55575 15.55575 15.55575 ZT20-23 15.77185 15.77185 15.77185