condition mean min max ZT0-3 1.16247207775 1.1100892285000001 1.214854927 ZT4-7 1.7751336977499999 1.0543344915 2.495932904 ZT8-11 8.8495897455 8.488553489 9.210626002 ZT12-15 11.113459667499999 9.8526204415 12.3742988935 ZT16-19 8.391997420000001 7.44324624 9.340748600000001 ZT20-23 24.04112426 13.47018184 34.61206668