condition mean min max ZT0-3 178.10000000000002 178.10000000000002 178.10000000000002 ZT4-7 138.0 138.0 138.0 ZT8-11 157.0 157.0 157.0 ZT12-15 187.9 187.9 187.9 ZT16-19 207.65 207.65 207.65 ZT20-23 168.0 168.0 168.0