condition mean min max ZT0-3 1.20437175 0.9096584999999999 1.499085 ZT4-7 2.4387600000000003 2.4387600000000003 2.4387600000000003 ZT8-11 2.4403550000000003 2.4403550000000003 2.4403550000000003 ZT12-15 0 0 0 ZT16-19 3.278955 3.278955 3.278955 ZT20-23 1.49642 1.49642 1.49642