condition mean min max ZT0-3 389.25 389.25 389.25 ZT4-7 452.5 452.5 452.5 ZT8-11 458.75 458.75 458.75 ZT12-15 264.2 264.2 264.2 ZT16-19 302.3 302.3 302.3 ZT20-23 298.5 298.5 298.5