condition mean min max ZT0-3 12.478 11.07825 13.877749999999999 ZT4-7 12.39935 12.39935 12.39935 ZT8-11 14.69975 14.69975 14.69975 ZT12-15 0 0 0 ZT16-19 15.15655 15.15655 15.15655 ZT20-23 12.6121 12.6121 12.6121