condition mean min max ZT0-3 74.484415 74.484415 74.484415 ZT4-7 65.40581800000001 65.40581800000001 65.40581800000001 ZT8-11 71.9681075 71.9681075 71.9681075 ZT12-15 64.1870845 64.1870845 64.1870845 ZT16-19 113.90405849999999 113.90405849999999 113.90405849999999 ZT20-23 87.255053 87.255053 87.255053