condition mean min max ZT0-3 0.8554835 0.73387 1.039709 ZT4-7 0.670785 0.670785 0.670785 ZT8-11 0.638215 0.638215 0.638215 ZT12-15 0.8442587500000001 0.8190995 0.869418 ZT16-19 0.6215145 0.6215145 0.6215145 ZT20-23 1.2025709999999998 1.2025709999999998 1.2025709999999998