condition mean min max ZT0-3 73.04601666666667 66.01095000000001 83.0627 ZT4-7 98.20785 98.20785 98.20785 ZT8-11 131.0985 131.0985 131.0985 ZT12-15 131.46925 124.15 138.7885 ZT16-19 125.968 125.968 125.968 ZT20-23 84.77285 84.77285 84.77285