condition mean min max ZT0-3 325.695519 325.695519 325.695519 ZT4-7 380.3662455 380.3662455 380.3662455 ZT8-11 367.5751345 367.5751345 367.5751345 ZT12-15 407.7942135 407.7942135 407.7942135 ZT16-19 409.5094885 409.5094885 409.5094885 ZT20-23 374.535078 374.535078 374.535078