condition mean min max ZT0-3 8.59437107175 1.273417164 15.9153249795 ZT4-7 52.615573805 44.122120905 61.109026705 ZT8-11 102.10949818499999 80.413240885 123.80575548499999 ZT12-15 143.135564375 136.8076972 149.46343155 ZT16-19 105.86902562499999 100.71794905 111.02010219999998 ZT20-23 87.295647505 82.11543459500001 92.475860415