condition mean min max ZT0-3 1.0225214999999999 1.0225214999999999 1.0225214999999999 ZT4-7 0.6146024999999999 0.6146024999999999 0.6146024999999999 ZT8-11 0.537228 0.537228 0.537228 ZT12-15 0.518427 0.518427 0.518427 ZT16-19 0.4077005 0.4077005 0.4077005 ZT20-23 1.1683 1.1683 1.1683