condition mean min max ZT0-3 1015.3 1015.3 1015.3 ZT4-7 1159.2 1159.2 1159.2 ZT8-11 1145.05 1145.05 1145.05 ZT12-15 1134.65 1134.65 1134.65 ZT16-19 1123.25 1123.25 1123.25 ZT20-23 1031.1 1031.1 1031.1