condition mean min max ZT0-3 25.3032090725 22.651916964999998 27.95450118 ZT4-7 20.1706187 16.92166228 23.41957512 ZT8-11 24.387600407500003 21.05199197 27.723208845000002 ZT12-15 23.004601215 20.117567585 25.891634845 ZT16-19 20.0782104175 19.503284735 20.653136099999998 ZT20-23 23.313233269999998 22.938783195 23.687683345