condition mean min max ZT0-3 14.066749999999999 14.066749999999999 14.066749999999999 ZT4-7 11.628605 11.628605 11.628605 ZT8-11 10.31806 10.31806 10.31806 ZT12-15 16.67375 16.67375 16.67375 ZT16-19 9.95176 9.95176 9.95176 ZT20-23 12.7766 12.7766 12.7766