condition mean min max ZT0-3 10.312043 10.312043 10.312043 ZT4-7 12.1990645 12.1990645 12.1990645 ZT8-11 9.934528 9.934528 9.934528 ZT12-15 10.507027 10.507027 10.507027 ZT16-19 10.127036499999999 10.127036499999999 10.127036499999999 ZT20-23 9.409875499999998 9.409875499999998 9.409875499999998