condition mean min max ZT0-3 1.09718025 1.0709255 1.123435 ZT4-7 0.6350480000000001 0.6350480000000001 0.6350480000000001 ZT8-11 0.8071360000000001 0.8071360000000001 0.8071360000000001 ZT12-15 0 0 0 ZT16-19 1.085266 1.085266 1.085266 ZT20-23 1.1896849999999999 1.1896849999999999 1.1896849999999999