condition mean min max ZT0-3 86.1669 86.1669 86.1669 ZT4-7 77.74170000000001 77.74170000000001 77.74170000000001 ZT8-11 48.149950000000004 48.149950000000004 48.149950000000004 ZT12-15 40.333749999999995 40.333749999999995 40.333749999999995 ZT16-19 57.315799999999996 57.315799999999996 57.315799999999996 ZT20-23 69.44605 69.44605 69.44605