condition mean min max ZT0-3 61.685100000000006 61.685100000000006 61.685100000000006 ZT4-7 63.98975 63.98975 63.98975 ZT8-11 46.9958 46.9958 46.9958 ZT12-15 50.076899999999995 50.076899999999995 50.076899999999995 ZT16-19 56.405550000000005 56.405550000000005 56.405550000000005 ZT20-23 58.16045 58.16045 58.16045