condition mean min max ZT0-3 67.0 67.0 67.0 ZT4-7 115.2 115.2 115.2 ZT8-11 69.2 69.2 69.2 ZT12-15 99.30000000000001 99.30000000000001 99.30000000000001 ZT16-19 78.9 78.9 78.9 ZT20-23 55.75 55.75 55.75