condition mean min max ZT0-3 0.29643200000000003 0.29643200000000003 0.29643200000000003 ZT4-7 0.05349895 0.05349895 0.05349895 ZT8-11 0.343246 0.343246 0.343246 ZT12-15 0.2578815 0.2578815 0.2578815 ZT16-19 0.5141705 0.5141705 0.5141705 ZT20-23 0.3062695 0.3062695 0.3062695