condition mean min max ZT0-3 27.6496 27.6496 27.6496 ZT4-7 24.17705 24.17705 24.17705 ZT8-11 33.283249999999995 33.283249999999995 33.283249999999995 ZT12-15 32.42495 32.42495 32.42495 ZT16-19 34.201899999999995 34.201899999999995 34.201899999999995 ZT20-23 24.09715 24.09715 24.09715