condition mean min max ZT0-3 66.92122499999999 62.5209 71.32155 ZT4-7 83.37635 83.37635 83.37635 ZT8-11 77.4851 77.4851 77.4851 ZT12-15 0 0 0 ZT16-19 71.19045 71.19045 71.19045 ZT20-23 78.86760000000001 78.86760000000001 78.86760000000001