condition mean min max ZT0-3 23.810783333333333 19.816 31.15345 ZT4-7 25.9042 25.9042 25.9042 ZT8-11 30.459699999999998 30.459699999999998 30.459699999999998 ZT12-15 47.591025 39.81595 55.3661 ZT16-19 29.3343 29.3343 29.3343 ZT20-23 26.61665 26.61665 26.61665