condition mean min max ZT0-3 1229.6 1229.6 1229.6 ZT4-7 971.1 971.1 971.1 ZT8-11 1310.65 1310.65 1310.65 ZT12-15 1231.85 1231.85 1231.85 ZT16-19 1310.85 1310.85 1310.85 ZT20-23 1451.2 1451.2 1451.2