condition mean min max ZT0-3 132.2 132.2 132.2 ZT4-7 169.5 169.5 169.5 ZT8-11 165.2 165.2 165.2 ZT12-15 177.45 177.45 177.45 ZT16-19 181.4 181.4 181.4 ZT20-23 130.05 130.05 130.05