condition mean min max ZT0-3 1186.85 1186.85 1186.85 ZT4-7 1091.4 1091.4 1091.4 ZT8-11 866.05 866.05 866.05 ZT12-15 995.8 995.8 995.8 ZT16-19 1052.2 1052.2 1052.2 ZT20-23 1068.85 1068.85 1068.85