condition mean min max ZT0-3 0.7252295 0.7252295 0.7252295 ZT4-7 0.463418 0.463418 0.463418 ZT8-11 0.232331 0.232331 0.232331 ZT12-15 0.3824125 0.3824125 0.3824125 ZT16-19 1.165991 1.165991 1.165991 ZT20-23 0.8412545 0.8412545 0.8412545