condition mean min max ZT0-3 145.2 145.2 145.2 ZT4-7 153.1 153.1 153.1 ZT8-11 248.5 248.5 248.5 ZT12-15 173.55 173.55 173.55 ZT16-19 151.85000000000002 151.85000000000002 151.85000000000002 ZT20-23 198.1 198.1 198.1