condition mean min max ZT0-3 270.6 270.6 270.6 ZT4-7 342.0 342.0 342.0 ZT8-11 301.54999999999995 301.54999999999995 301.54999999999995 ZT12-15 287.35 287.35 287.35 ZT16-19 237.25 237.25 237.25 ZT20-23 303.75 303.75 303.75