condition mean min max ZT0-3 1715.85 1715.85 1715.85 ZT4-7 1222.9 1222.9 1222.9 ZT8-11 1261.8 1261.8 1261.8 ZT12-15 1543.7 1543.7 1543.7 ZT16-19 1840.4 1840.4 1840.4 ZT20-23 1979.1999999999998 1979.1999999999998 1979.1999999999998