condition mean min max ZT0-3 327.29446 327.29446 327.29446 ZT4-7 320.7486155 320.7486155 320.7486155 ZT8-11 256.570894 256.570894 256.570894 ZT12-15 273.851381 273.851381 273.851381 ZT16-19 384.4574745 384.4574745 384.4574745 ZT20-23 456.37896 456.37896 456.37896