condition mean min max ZT0-3 13.8783128375 11.57651968 16.180105994999998 ZT4-7 14.5756374425 13.264492324999999 15.88678256 ZT8-11 11.9758425455 11.917841745 12.033843346000001 ZT12-15 12.732876035 12.247625575 13.218126495 ZT16-19 23.3813879625 17.492748245 29.27002768 ZT20-23 37.2751097175 35.19638796 39.353831475