condition mean min max ZT0-3 0.2252765 0.1339215 0.31663149999999995 ZT4-7 0.36093149999999996 0.36093149999999996 0.36093149999999996 ZT8-11 0.33921100000000004 0.33921100000000004 0.33921100000000004 ZT12-15 0 0 0 ZT16-19 0.200171 0.200171 0.200171 ZT20-23 0.357199 0.357199 0.357199