condition mean min max ZT0-3 170.001288 170.001288 170.001288 ZT4-7 285.8054705 285.8054705 285.8054705 ZT8-11 425.6824795 425.6824795 425.6824795 ZT12-15 431.747888 431.747888 431.747888 ZT16-19 413.0601145 413.0601145 413.0601145 ZT20-23 402.789673 402.789673 402.789673