condition mean min max ZT0-3 69.5663 69.5663 69.5663 ZT4-7 68.37395000000001 68.37395000000001 68.37395000000001 ZT8-11 19.5997 19.5997 19.5997 ZT12-15 29.625 29.625 29.625 ZT16-19 55.1244 55.1244 55.1244 ZT20-23 71.5447 71.5447 71.5447