condition mean min max ZT0-3 170.2 170.2 170.2 ZT4-7 266.8 266.8 266.8 ZT8-11 188.75 188.75 188.75 ZT12-15 186.1 186.1 186.1 ZT16-19 203.7 203.7 203.7 ZT20-23 156.45 156.45 156.45