condition mean min max ZT0-3 320.25 320.25 320.25 ZT4-7 282.6 282.6 282.6 ZT8-11 202.95 202.95 202.95 ZT12-15 229.45 229.45 229.45 ZT16-19 299.25 299.25 299.25 ZT20-23 312.05 312.05 312.05