condition mean min max ZT0-3 30.541649999999997 30.541649999999997 30.541649999999997 ZT4-7 24.16015 24.16015 24.16015 ZT8-11 18.2354 18.2354 18.2354 ZT12-15 13.7394 13.7394 13.7394 ZT16-19 20.522550000000003 20.522550000000003 20.522550000000003 ZT20-23 28.9174 28.9174 28.9174