condition mean min max ZT0-3 14.81485 13.9191 15.7106 ZT4-7 12.457650000000001 12.457650000000001 12.457650000000001 ZT8-11 9.823335 9.823335 9.823335 ZT12-15 0 0 0 ZT16-19 11.16196 11.16196 11.16196 ZT20-23 15.29245 15.29245 15.29245