condition mean min max ZT0-3 325.25 325.25 325.25 ZT4-7 315.6 315.6 315.6 ZT8-11 317.20000000000005 317.20000000000005 317.20000000000005 ZT12-15 379.55 379.55 379.55 ZT16-19 470.75 470.75 470.75 ZT20-23 391.6 391.6 391.6