condition mean min max ZT0-3 740.6500000000001 740.6500000000001 740.6500000000001 ZT4-7 984.4 984.4 984.4 ZT8-11 886.95 886.95 886.95 ZT12-15 908.4000000000001 908.4000000000001 908.4000000000001 ZT16-19 930.5 930.5 930.5 ZT20-23 763.95 763.95 763.95