condition mean min max ZT0-3 49.611595845 41.20055476 58.02263693 ZT4-7 21.796475035 20.638469715 22.954480355 ZT8-11 26.546368870000002 23.728389370000002 29.364348370000002 ZT12-15 29.8363624275 29.089157175 30.58356768 ZT16-19 41.8049088825 39.357429945 44.252387819999996 ZT20-23 62.39375959499999 56.200617895 68.58690129499999