condition mean min max ZT0-3 320.8 320.8 320.8 ZT4-7 204.3 204.3 204.3 ZT8-11 241.65 241.65 241.65 ZT12-15 244.55 244.55 244.55 ZT16-19 233.55 233.55 233.55 ZT20-23 215.5 215.5 215.5