condition mean min max ZT0-3 12.36362 12.36362 12.36362 ZT4-7 12.688981 12.688981 12.688981 ZT8-11 11.0357185 11.0357185 11.0357185 ZT12-15 10.545918 10.545918 10.545918 ZT16-19 12.0459005 12.0459005 12.0459005 ZT20-23 11.762609999999999 11.762609999999999 11.762609999999999