condition mean min max ZT0-3 236.75 236.75 236.75 ZT4-7 245.8 245.8 245.8 ZT8-11 202.5 202.5 202.5 ZT12-15 201.39999999999998 201.39999999999998 201.39999999999998 ZT16-19 258.7 258.7 258.7 ZT20-23 310.05 310.05 310.05