condition mean min max ZT0-3 61.89339666666667 2.36601 175.255 ZT4-7 88.49595 88.49595 88.49595 ZT8-11 10.860785 10.860785 10.860785 ZT12-15 21.8568825 10.014065 33.6997 ZT16-19 2.91434 2.91434 2.91434 ZT20-23 2.98442 2.98442 2.98442