condition mean min max ZT0-3 951.3 951.3 951.3 ZT4-7 833.2 833.2 833.2 ZT8-11 1008.05 1008.05 1008.05 ZT12-15 1082.35 1082.35 1082.35 ZT16-19 966.2 966.2 966.2 ZT20-23 839.0 839.0 839.0