condition mean min max ZT0-3 0.8701708333333333 0.50595 1.065401 ZT4-7 0.28274 0.28274 0.28274 ZT8-11 1.0168155 1.0168155 1.0168155 ZT12-15 1.23310925 0.7966385 1.66958 ZT16-19 1.069485 1.069485 1.069485 ZT20-23 1.4401199999999998 1.4401199999999998 1.4401199999999998