condition mean min max ZT0-3 58.450633333333336 19.80865 88.43165 ZT4-7 23.6573 23.6573 23.6573 ZT8-11 31.852649999999997 31.852649999999997 31.852649999999997 ZT12-15 125.5724 87.9108 163.234 ZT16-19 119.928 119.928 119.928 ZT20-23 109.32300000000001 109.32300000000001 109.32300000000001