condition mean min max ZT0-3 15853.65 15853.65 15853.65 ZT4-7 18327.1 18327.1 18327.1 ZT8-11 17505.15 17505.15 17505.15 ZT12-15 14116.25 14116.25 14116.25 ZT16-19 12321.599999999999 12321.599999999999 12321.599999999999 ZT20-23 13308.45 13308.45 13308.45