condition mean min max ZT0-3 135.519768 135.519768 135.519768 ZT4-7 148.2577565 148.2577565 148.2577565 ZT8-11 157.74172249999998 157.74172249999998 157.74172249999998 ZT12-15 137.488493 137.488493 137.488493 ZT16-19 151.161448 151.161448 151.161448 ZT20-23 176.77438949999998 176.77438949999998 176.77438949999998