condition mean min max ZT0-3 2.2523283333333333 2.02196 2.42706 ZT4-7 2.898485 2.898485 2.898485 ZT8-11 1.10494 1.10494 1.10494 ZT12-15 0.00771755 0.0076229 0.0078122 ZT16-19 0.8599 0.8599 0.8599 ZT20-23 2.3684149999999997 2.3684149999999997 2.3684149999999997