condition mean min max ZT0-3 47.78575 47.78575 47.78575 ZT4-7 35.41045 35.41045 35.41045 ZT8-11 65.37915000000001 65.37915000000001 65.37915000000001 ZT12-15 45.44675 45.44675 45.44675 ZT16-19 53.920249999999996 53.920249999999996 53.920249999999996 ZT20-23 52.2723 52.2723 52.2723