condition mean min max ZT0-3 0.29261297225 0.19372472100000002 0.3915012235 ZT4-7 1.05263219475 1.0268521945 1.0784121949999999 ZT8-11 0.8200452792499999 0.604971229 1.0351193294999999 ZT12-15 2.2431383924999997 1.478709206 3.007567579 ZT16-19 5.802574659999999 5.174939332 6.430209988 ZT20-23 7.61069012275 7.2256328885 7.995747357