condition mean min max ZT0-3 843.2 843.2 843.2 ZT4-7 525.4 525.4 525.4 ZT8-11 609.4000000000001 609.4000000000001 609.4000000000001 ZT12-15 675.05 675.05 675.05 ZT16-19 876.2 876.2 876.2 ZT20-23 803.45 803.45 803.45