condition mean min max ZT0-3 0.297147 0.297147 0.297147 ZT4-7 0.0273404 0.0273404 0.0273404 ZT8-11 0.1257875 0.1257875 0.1257875 ZT12-15 0.531123 0.531123 0.531123 ZT16-19 1.1891445 1.1891445 1.1891445 ZT20-23 0.4008045 0.4008045 0.4008045