condition mean min max ZT0-3 72.52834999999999 67.24345 77.81325 ZT4-7 42.0252 42.0252 42.0252 ZT8-11 37.8557 37.8557 37.8557 ZT12-15 0 0 0 ZT16-19 35.78645 35.78645 35.78645 ZT20-23 50.39525 50.39525 50.39525