condition mean min max ZT0-3 50.55 50.55 50.55 ZT4-7 54.4 54.4 54.4 ZT8-11 38.7 38.7 38.7 ZT12-15 24.15 24.15 24.15 ZT16-19 68.3 68.3 68.3 ZT20-23 57.699999999999996 57.699999999999996 57.699999999999996