condition mean min max ZT0-3 487.4 487.4 487.4 ZT4-7 340.0 340.0 340.0 ZT8-11 291.65 291.65 291.65 ZT12-15 326.70000000000005 326.70000000000005 326.70000000000005 ZT16-19 404.45 404.45 404.45 ZT20-23 496.5 496.5 496.5