condition mean min max ZT0-3 1.1043475 1.1043475 1.1043475 ZT4-7 0.673655 0.673655 0.673655 ZT8-11 1.3693615000000001 1.3693615000000001 1.3693615000000001 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.7384005 0.7384005 0.7384005