condition mean min max ZT0-3 3.546673333333333 1.71524 5.84357 ZT4-7 1.028255 1.028255 1.028255 ZT8-11 0.0 0.0 0.0 ZT12-15 0.577585 0.0 1.15517 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0