condition mean min max ZT0-3 1861.4 1861.4 1861.4 ZT4-7 3204.1 3204.1 3204.1 ZT8-11 3216.2 3216.2 3216.2 ZT12-15 2230.1 2230.1 2230.1 ZT16-19 1326.8 1326.8 1326.8 ZT20-23 1294.8 1294.8 1294.8