condition mean min max ZT0-3 345.4 345.4 345.4 ZT4-7 271.3 271.3 271.3 ZT8-11 325.7 325.7 325.7 ZT12-15 407.8 407.8 407.8 ZT16-19 336.75 336.75 336.75 ZT20-23 225.0 225.0 225.0