condition mean min max ZT0-3 1162.786628 1162.786628 1162.786628 ZT4-7 1511.2622195 1511.2622195 1511.2622195 ZT8-11 1492.3887995 1492.3887995 1492.3887995 ZT12-15 1611.9152060000001 1611.9152060000001 1611.9152060000001 ZT16-19 1298.030806 1298.030806 1298.030806 ZT20-23 1255.442982 1255.442982 1255.442982