condition mean min max ZT0-3 1.0335685000000001 0.905682 1.1614550000000001 ZT4-7 1.64735 1.64735 1.64735 ZT8-11 1.49935 1.49935 1.49935 ZT12-15 0 0 0 ZT16-19 0.8067280000000001 0.8067280000000001 0.8067280000000001 ZT20-23 1.22214 1.22214 1.22214