condition mean min max ZT0-3 1964.0275987999999 755.6430551 3172.4121425 ZT4-7 7582.31644875 7079.134755499999 8085.498142 ZT8-11 7961.208779250001 6648.7500435 9273.667515000001 ZT12-15 2115.859331575 841.99637465 3389.7222885 ZT16-19 1045.337586725 976.23273795 1114.4424354999999 ZT20-23 983.808468775 886.87644695 1080.7404906000002