condition mean min max ZT0-3 213.4 213.4 213.4 ZT4-7 136.5 136.5 136.5 ZT8-11 175.75 175.75 175.75 ZT12-15 247.15 247.15 247.15 ZT16-19 265.4 265.4 265.4 ZT20-23 237.55 237.55 237.55