condition mean min max ZT0-3 3.45058 3.170835 3.730325 ZT4-7 5.18253 5.18253 5.18253 ZT8-11 5.521155 5.521155 5.521155 ZT12-15 0 0 0 ZT16-19 4.373965 4.373965 4.373965 ZT20-23 4.835885 4.835885 4.835885