condition mean min max ZT0-3 29.0011 25.63065 32.37155 ZT4-7 20.623800000000003 20.623800000000003 20.623800000000003 ZT8-11 24.2652 24.2652 24.2652 ZT12-15 0 0 0 ZT16-19 26.11285 26.11285 26.11285 ZT20-23 26.48795 26.48795 26.48795