condition mean min max ZT0-3 10.938749999999999 10.938749999999999 10.938749999999999 ZT4-7 9.16005 9.16005 9.16005 ZT8-11 11.3289 11.3289 11.3289 ZT12-15 9.97564 9.97564 9.97564 ZT16-19 10.7722 10.7722 10.7722 ZT20-23 8.37153 8.37153 8.37153