condition mean min max ZT0-3 0.6517820000000001 0.5371065 0.7664575 ZT4-7 0.18131395 0.18131395 0.18131395 ZT8-11 0.8691675 0.8691675 0.8691675 ZT12-15 0 0 0 ZT16-19 1.3207499999999999 1.3207499999999999 1.3207499999999999 ZT20-23 1.12067 1.12067 1.12067