condition mean min max ZT0-3 41.830079 41.830079 41.830079 ZT4-7 63.980630500000004 63.980630500000004 63.980630500000004 ZT8-11 79.79420099999999 79.79420099999999 79.79420099999999 ZT12-15 63.234466999999995 63.234466999999995 63.234466999999995 ZT16-19 70.5549465 70.5549465 70.5549465 ZT20-23 61.275203499999996 61.275203499999996 61.275203499999996