condition mean min max ZT0-3 21.689455 21.689455 21.689455 ZT4-7 21.072970499999997 21.072970499999997 21.072970499999997 ZT8-11 25.855601 25.855601 25.855601 ZT12-15 22.746673 22.746673 22.746673 ZT16-19 33.9225155 33.9225155 33.9225155 ZT20-23 27.1064425 27.1064425 27.1064425