condition mean min max ZT0-3 9.53949805225 7.9934448945000005 11.08555121 ZT4-7 6.4572230415 6.2023451734999995 6.7121009095 ZT8-11 5.54441399375 5.033403746 6.0554242415 ZT12-15 3.0726439245 2.5602274544999997 3.5850603945 ZT16-19 4.804338392 3.6595576375 5.949119146500001 ZT20-23 7.8900197927499995 5.643247325 10.1367922605