condition mean min max ZT0-3 232.92016666666666 178.2 266.283 ZT4-7 158.817 158.817 158.817 ZT8-11 74.75825 74.75825 74.75825 ZT12-15 61.282525 60.90005 61.665 ZT16-19 78.95495 78.95495 78.95495 ZT20-23 160.494 160.494 160.494