condition mean min max ZT0-3 2427.7 2427.7 2427.7 ZT4-7 154.1 154.1 154.1 ZT8-11 603.35 603.35 603.35 ZT12-15 553.35 553.35 553.35 ZT16-19 1022.0 1022.0 1022.0 ZT20-23 1344.6 1344.6 1344.6