condition mean min max ZT0-3 0.21652682499999998 0.19764665 0.23540699999999998 ZT4-7 1.87927 1.87927 1.87927 ZT8-11 0.3362155 0.3362155 0.3362155 ZT12-15 0 0 0 ZT16-19 0.06612 0.06612 0.06612 ZT20-23 0.33198700000000003 0.33198700000000003 0.33198700000000003