condition mean min max ZT0-3 0.5321549295 0.13029507099999998 0.934014788 ZT4-7 1.2961121857500002 1.0624852675 1.5297391040000001 ZT8-11 1.484493383 1.322944198 1.646042568 ZT12-15 0.51489001925 0.230670268 0.7991097705 ZT16-19 0.31766043899999996 0.25513355849999997 0.3801873195 ZT20-23 0.196012531 0.15576435700000002 0.23626070499999996