condition mean min max ZT0-3 0.210153125 0.0965815 0.32372475 ZT4-7 0.9594579999999999 0.9594579999999999 0.9594579999999999 ZT8-11 3.20228 3.20228 3.20228 ZT12-15 0 0 0 ZT16-19 1.3489825 1.3489825 1.3489825 ZT20-23 0.2331625 0.2331625 0.2331625