condition mean min max ZT0-3 236.7 236.7 236.7 ZT4-7 191.4 191.4 191.4 ZT8-11 197.15 197.15 197.15 ZT12-15 255.3 255.3 255.3 ZT16-19 283.1 283.1 283.1 ZT20-23 254.45 254.45 254.45