condition mean min max ZT0-3 144.5 144.5 144.5 ZT4-7 191.1 191.1 191.1 ZT8-11 176.9 176.9 176.9 ZT12-15 187.55 187.55 187.55 ZT16-19 147.35 147.35 147.35 ZT20-23 162.05 162.05 162.05