condition mean min max ZT0-3 1.79241 1.77147 1.81335 ZT4-7 3.665435 3.665435 3.665435 ZT8-11 0.92294 0.92294 0.92294 ZT12-15 0 0 0 ZT16-19 1.78798 1.78798 1.78798 ZT20-23 3.57937 3.57937 3.57937