condition mean min max ZT0-3 0.44232550000000004 0.44232550000000004 0.44232550000000004 ZT4-7 0.1756775 0.1756775 0.1756775 ZT8-11 0.401139 0.401139 0.401139 ZT12-15 0.453777 0.453777 0.453777 ZT16-19 1.187003 1.187003 1.187003 ZT20-23 0.48112350000000004 0.48112350000000004 0.48112350000000004