condition mean min max ZT0-3 397.45 397.45 397.45 ZT4-7 707.0 707.0 707.0 ZT8-11 547.7 547.7 547.7 ZT12-15 369.04999999999995 369.04999999999995 369.04999999999995 ZT16-19 504.3 504.3 504.3 ZT20-23 589.6500000000001 589.6500000000001 589.6500000000001