condition mean min max ZT0-3 50.753643 50.753643 50.753643 ZT4-7 47.6294135 47.6294135 47.6294135 ZT8-11 44.3480925 44.3480925 44.3480925 ZT12-15 66.5822995 66.5822995 66.5822995 ZT16-19 46.4908385 46.4908385 46.4908385 ZT20-23 73.0250545 73.0250545 73.0250545