condition mean min max ZT0-3 83.229019 83.229019 83.229019 ZT4-7 98.725068 98.725068 98.725068 ZT8-11 120.25365049999999 120.25365049999999 120.25365049999999 ZT12-15 74.2421095 74.2421095 74.2421095 ZT16-19 61.061640499999996 61.061640499999996 61.061640499999996 ZT20-23 65.835757 65.835757 65.835757