condition mean min max ZT0-3 2379.8 2379.8 2379.8 ZT4-7 2018.0 2018.0 2018.0 ZT8-11 2044.75 2044.75 2044.75 ZT12-15 1958.85 1958.85 1958.85 ZT16-19 2145.95 2145.95 2145.95 ZT20-23 2373.0 2373.0 2373.0