condition mean min max ZT0-3 2242.0825 2118.81 2365.355 ZT4-7 952.1120000000001 952.1120000000001 952.1120000000001 ZT8-11 279.5235 279.5235 279.5235 ZT12-15 0 0 0 ZT16-19 1147.583 1147.583 1147.583 ZT20-23 1338.775 1338.775 1338.775