condition mean min max ZT0-3 55.52305 30.744100000000003 73.94839999999999 ZT4-7 28.5916 28.5916 28.5916 ZT8-11 29.69515 29.69515 29.69515 ZT12-15 45.160824999999996 42.689499999999995 47.632149999999996 ZT16-19 56.6473 56.6473 56.6473 ZT20-23 81.794 81.794 81.794