condition mean min max ZT0-3 261.45 261.45 261.45 ZT4-7 298.3 298.3 298.3 ZT8-11 241.75 241.75 241.75 ZT12-15 293.0 293.0 293.0 ZT16-19 243.35000000000002 243.35000000000002 243.35000000000002 ZT20-23 261.25 261.25 261.25