condition mean min max ZT0-3 177.55 177.55 177.55 ZT4-7 186.6 186.6 186.6 ZT8-11 193.4 193.4 193.4 ZT12-15 173.3 173.3 173.3 ZT16-19 193.75 193.75 193.75 ZT20-23 169.35 169.35 169.35