condition mean min max ZT0-3 0.5154195 0.5154195 0.5154195 ZT4-7 0.619893 0.619893 0.619893 ZT8-11 0.3292085 0.3292085 0.3292085 ZT12-15 0.49835549999999995 0.49835549999999995 0.49835549999999995 ZT16-19 0.468078 0.468078 0.468078 ZT20-23 0.21390399999999998 0.21390399999999998 0.21390399999999998