condition mean min max ZT0-3 133.8 133.8 133.8 ZT4-7 117.0 117.0 117.0 ZT8-11 116.3 116.3 116.3 ZT12-15 159.3 159.3 159.3 ZT16-19 135.8 135.8 135.8 ZT20-23 146.65 146.65 146.65