condition mean min max ZT0-3 2412.35 2412.35 2412.35 ZT4-7 2438.0 2438.0 2438.0 ZT8-11 2544.2 2544.2 2544.2 ZT12-15 2759.6 2759.6 2759.6 ZT16-19 2903.1000000000004 2903.1000000000004 2903.1000000000004 ZT20-23 2582.65 2582.65 2582.65