condition mean min max ZT0-3 2582.3 2582.3 2582.3 ZT4-7 3477.5 3477.5 3477.5 ZT8-11 3168.15 3168.15 3168.15 ZT12-15 3060.8 3060.8 3060.8 ZT16-19 3463.6 3463.6 3463.6 ZT20-23 3202.45 3202.45 3202.45