condition mean min max ZT0-3 146.610094 146.610094 146.610094 ZT4-7 158.7675945 158.7675945 158.7675945 ZT8-11 245.684645 245.684645 245.684645 ZT12-15 225.9533895 225.9533895 225.9533895 ZT16-19 397.2290895 397.2290895 397.2290895 ZT20-23 544.5858390000001 544.5858390000001 544.5858390000001