condition mean min max ZT0-3 1476.15 1476.15 1476.15 ZT4-7 2066.7 2066.7 2066.7 ZT8-11 1907.4 1907.4 1907.4 ZT12-15 1718.65 1718.65 1718.65 ZT16-19 1985.1 1985.1 1985.1 ZT20-23 2044.4 2044.4 2044.4