condition mean min max ZT0-3 2.36242 2.252365 2.472475 ZT4-7 11.842099999999999 11.842099999999999 11.842099999999999 ZT8-11 22.617199999999997 22.617199999999997 22.617199999999997 ZT12-15 0 0 0 ZT16-19 10.064785 10.064785 10.064785 ZT20-23 7.51501 7.51501 7.51501