condition mean min max ZT0-3 0.0376006 0.0376006 0.0376006 ZT4-7 0.0124964 0.0124964 0.0124964 ZT8-11 0.04393355 0.04393355 0.04393355 ZT12-15 0.04920595 0.04920595 0.04920595 ZT16-19 0.0109641 0.0109641 0.0109641 ZT20-23 0.037722149999999996 0.037722149999999996 0.037722149999999996