condition mean min max ZT0-3 0.42551249999999996 0.39208699999999996 0.45893799999999996 ZT4-7 0.491151 0.491151 0.491151 ZT8-11 0.1537915 0.1537915 0.1537915 ZT12-15 0 0 0 ZT16-19 0.330977 0.330977 0.330977 ZT20-23 0.2718905 0.2718905 0.2718905