condition mean min max ZT0-3 65.782025 63.937799999999996 67.62625 ZT4-7 37.7685 37.7685 37.7685 ZT8-11 14.7052 14.7052 14.7052 ZT12-15 0 0 0 ZT16-19 39.41355 39.41355 39.41355 ZT20-23 55.82765 55.82765 55.82765