condition mean min max ZT0-3 7.0590399999999995 7.0590399999999995 7.0590399999999995 ZT4-7 5.9620999999999995 5.9620999999999995 5.9620999999999995 ZT8-11 5.54954 5.54954 5.54954 ZT12-15 8.52541 8.52541 8.52541 ZT16-19 6.883649999999999 6.883649999999999 6.883649999999999 ZT20-23 7.91498 7.91498 7.91498