condition mean min max ZT0-3 29.2874 26.4859 32.0889 ZT4-7 16.5539 16.5539 16.5539 ZT8-11 53.44625 53.44625 53.44625 ZT12-15 0 0 0 ZT16-19 58.2953 58.2953 58.2953 ZT20-23 51.54995 51.54995 51.54995