condition mean min max ZT0-3 0.5051257499999999 0.198229 0.8120225 ZT4-7 0.8136384999999999 0.8136384999999999 0.8136384999999999 ZT8-11 2.4496599999999997 2.4496599999999997 2.4496599999999997 ZT12-15 0 0 0 ZT16-19 1.596675 1.596675 1.596675 ZT20-23 1.2058125 1.2058125 1.2058125