condition mean min max ZT0-3 48.1833227885 28.194540817000004 68.17210476 ZT4-7 27.704392334999998 15.171238865 40.237545804999996 ZT8-11 28.602733505000003 24.37463805 32.830828960000005 ZT12-15 6.649983956 5.179917103499999 8.1200508085 ZT16-19 12.61987588625 8.8158065375 16.423945234999998 ZT20-23 27.15067129 18.815236485 35.486106095