condition mean min max ZT0-3 0.674578 0.618311 0.730845 ZT4-7 0.106301 0.106301 0.106301 ZT8-11 0.412861 0.412861 0.412861 ZT12-15 0 0 0 ZT16-19 0.204924 0.204924 0.204924 ZT20-23 0.3082465 0.3082465 0.3082465