condition mean min max ZT0-3 0.47622516666666664 0.1346665 1.104075 ZT4-7 0.5207649999999999 0.5207649999999999 0.5207649999999999 ZT8-11 0.8353225 0.8353225 0.8353225 ZT12-15 1.9991174999999999 1.7718349999999998 2.2264 ZT16-19 0.9502485 0.9502485 0.9502485 ZT20-23 0.5459145 0.5459145 0.5459145