condition mean min max ZT0-3 52.3253 52.3253 52.3253 ZT4-7 37.181200000000004 37.181200000000004 37.181200000000004 ZT8-11 35.940799999999996 35.940799999999996 35.940799999999996 ZT12-15 35.53915 35.53915 35.53915 ZT16-19 51.07285 51.07285 51.07285 ZT20-23 57.8851 57.8851 57.8851