condition mean min max ZT0-3 1950.35 1950.35 1950.35 ZT4-7 1545.6 1545.6 1545.6 ZT8-11 2081.55 2081.55 2081.55 ZT12-15 2448.8999999999996 2448.8999999999996 2448.8999999999996 ZT16-19 2617.15 2617.15 2617.15 ZT20-23 2516.6000000000004 2516.6000000000004 2516.6000000000004