condition mean min max ZT0-3 12.58585 12.04585 13.12585 ZT4-7 14.16175 14.16175 14.16175 ZT8-11 12.6401 12.6401 12.6401 ZT12-15 0 0 0 ZT16-19 16.1192 16.1192 16.1192 ZT20-23 17.59395 17.59395 17.59395