condition mean min max ZT0-3 190.23933333333335 190.23933333333335 190.23933333333335 ZT4-7 154.6565 154.6565 154.6565 ZT8-11 88.0761 88.0761 88.0761 ZT12-15 163.574 163.574 163.574 ZT16-19 351.23199999999997 351.23199999999997 351.23199999999997 ZT20-23 122.53 122.53 122.53