condition mean min max ZT0-3 31.047725000000003 26.558100000000003 35.53735 ZT4-7 26.868650000000002 26.868650000000002 26.868650000000002 ZT8-11 29.98865 29.98865 29.98865 ZT12-15 0 0 0 ZT16-19 47.21665 47.21665 47.21665 ZT20-23 42.8279 42.8279 42.8279