condition mean min max ZT0-3 208.75 208.75 208.75 ZT4-7 235.2 235.2 235.2 ZT8-11 186.2 186.2 186.2 ZT12-15 154.85 154.85 154.85 ZT16-19 187.3 187.3 187.3 ZT20-23 274.25 274.25 274.25