condition mean min max ZT0-3 12.757689999999998 8.05032 16.7336 ZT4-7 5.23779 5.23779 5.23779 ZT8-11 6.99646 6.99646 6.99646 ZT12-15 12.1945125 10.204975000000001 14.18405 ZT16-19 16.922 16.922 16.922 ZT20-23 20.4122 20.4122 20.4122