condition mean min max ZT0-3 400.75 400.75 400.75 ZT4-7 371.7 371.7 371.7 ZT8-11 357.0 357.0 357.0 ZT12-15 415.6 415.6 415.6 ZT16-19 300.7 300.7 300.7 ZT20-23 316.7 316.7 316.7