condition mean min max ZT0-3 2272.45 2272.45 2272.45 ZT4-7 1609.6 1609.6 1609.6 ZT8-11 1335.75 1335.75 1335.75 ZT12-15 1133.8 1133.8 1133.8 ZT16-19 1977.3 1977.3 1977.3 ZT20-23 2419.1 2419.1 2419.1