condition mean min max ZT0-3 58.036065 58.036065 58.036065 ZT4-7 76.350689 76.350689 76.350689 ZT8-11 78.2118485 78.2118485 78.2118485 ZT12-15 85.5515175 85.5515175 85.5515175 ZT16-19 76.5127895 76.5127895 76.5127895 ZT20-23 62.529264999999995 62.529264999999995 62.529264999999995