condition mean min max ZT0-3 260.428 211.5255 302.5715 ZT4-7 147.0365 147.0365 147.0365 ZT8-11 146.7255 146.7255 146.7255 ZT12-15 210.3995 160.01 260.789 ZT16-19 279.897 279.897 279.897 ZT20-23 383.913 383.913 383.913