condition mean min max ZT0-3 24.59805 24.59805 24.59805 ZT4-7 39.6021 39.6021 39.6021 ZT8-11 24.7462 24.7462 24.7462 ZT12-15 14.82815 14.82815 14.82815 ZT16-19 16.9912 16.9912 16.9912 ZT20-23 16.7523 16.7523 16.7523