condition mean min max ZT0-3 47.4722383725 40.268014855 54.67646189 ZT4-7 35.2355643075 33.284047575 37.187081039999995 ZT8-11 49.010438405 37.436689255 60.584187555 ZT12-15 38.3468942325 26.14847987 50.545308595 ZT16-19 25.116598332499997 22.732960679999998 27.500235985 ZT20-23 36.29316182 31.419671349999998 41.16665229