condition mean min max ZT0-3 34.6871 34.6871 34.6871 ZT4-7 66.1959 66.1959 66.1959 ZT8-11 25.11655 25.11655 25.11655 ZT12-15 5.43614 5.43614 5.43614 ZT16-19 4.577775 4.577775 4.577775 ZT20-23 13.5583 13.5583 13.5583