condition mean min max ZT0-3 4.9841 4.9841 4.9841 ZT4-7 2.994755 2.994755 2.994755 ZT8-11 0.382279 0.382279 0.382279 ZT12-15 0.5157685 0.5157685 0.5157685 ZT16-19 37.6844 37.6844 37.6844 ZT20-23 11.53065 11.53065 11.53065