condition mean min max ZT0-3 22.255004271 19.266055942 25.2439526 ZT4-7 13.181927348750001 9.1098567225 17.253997975 ZT8-11 27.2725491675 20.38053223 34.164566105 ZT12-15 27.610703344999997 24.927686875 30.293719815 ZT16-19 16.2043840275 15.62078195 16.787986105 ZT20-23 11.52979931925 11.017939581 12.0416590575