condition mean min max ZT0-3 0.7265385 0.7265385 0.7265385 ZT4-7 0.95045 0.95045 0.95045 ZT8-11 1.0338289999999999 1.0338289999999999 1.0338289999999999 ZT12-15 1.033525 1.033525 1.033525 ZT16-19 1.0478255 1.0478255 1.0478255 ZT20-23 0.6928195 0.6928195 0.6928195