condition mean min max ZT0-3 1461.75 1461.75 1461.75 ZT4-7 974.5 974.5 974.5 ZT8-11 978.65 978.65 978.65 ZT12-15 839.3499999999999 839.3499999999999 839.3499999999999 ZT16-19 1109.8 1109.8 1109.8 ZT20-23 1440.7 1440.7 1440.7