condition mean min max ZT0-3 10.396799999999999 10.396799999999999 10.396799999999999 ZT4-7 17.6632 17.6632 17.6632 ZT8-11 24.4794 24.4794 24.4794 ZT12-15 15.4598 15.4598 15.4598 ZT16-19 13.9796 13.9796 13.9796 ZT20-23 7.78264 7.78264 7.78264