condition mean min max ZT0-3 177.9 177.9 177.9 ZT4-7 264.7 264.7 264.7 ZT8-11 343.9 343.9 343.9 ZT12-15 369.35 369.35 369.35 ZT16-19 338.15 338.15 338.15 ZT20-23 273.1 273.1 273.1