condition mean min max ZT0-3 10.5132108645 9.906829339 11.119592390000001 ZT4-7 12.11075659 11.16701324 13.05449994 ZT8-11 14.680076464999999 12.467042845 16.893110085 ZT12-15 25.110378652499996 20.368653854999998 29.852103449999998 ZT16-19 25.8345972325 25.003571445 26.665623019999998 ZT20-23 26.52562504 25.439854075 27.611396005