condition mean min max ZT0-3 9.2573425 8.344635 10.17005 ZT4-7 4.52323 4.52323 4.52323 ZT8-11 1.3313549999999998 1.3313549999999998 1.3313549999999998 ZT12-15 0 0 0 ZT16-19 2.48429 2.48429 2.48429 ZT20-23 9.46185 9.46185 9.46185