condition mean min max ZT0-3 226.01883333333333 222.9355 229.334 ZT4-7 213.0805 213.0805 213.0805 ZT8-11 153.7225 153.7225 153.7225 ZT12-15 118.7175 118.43299999999999 119.00200000000001 ZT16-19 141.386 141.386 141.386 ZT20-23 203.298 203.298 203.298