condition mean min max ZT0-3 11.764990000000001 11.764990000000001 11.764990000000001 ZT4-7 11.987295 11.987295 11.987295 ZT8-11 16.2624 16.2624 16.2624 ZT12-15 40.38935 40.38935 40.38935 ZT16-19 35.351549999999996 35.351549999999996 35.351549999999996 ZT20-23 17.35775 17.35775 17.35775