condition mean min max ZT0-3 1264.75 1264.75 1264.75 ZT4-7 938.0 938.0 938.0 ZT8-11 883.7 883.7 883.7 ZT12-15 879.1 879.1 879.1 ZT16-19 778.8 778.8 778.8 ZT20-23 1080.6 1080.6 1080.6