condition mean min max ZT0-3 258.05 258.05 258.05 ZT4-7 177.6 177.6 177.6 ZT8-11 189.05 189.05 189.05 ZT12-15 231.0 231.0 231.0 ZT16-19 256.85 256.85 256.85 ZT20-23 350.05 350.05 350.05