condition mean min max ZT0-3 1944.85 1944.85 1944.85 ZT4-7 1809.0 1809.0 1809.0 ZT8-11 1236.45 1236.45 1236.45 ZT12-15 720.6 720.6 720.6 ZT16-19 836.1 836.1 836.1 ZT20-23 1393.6 1393.6 1393.6