condition mean min max ZT0-3 11.438302499999999 10.550654999999999 12.325949999999999 ZT4-7 7.134145 7.134145 7.134145 ZT8-11 4.85473 4.85473 4.85473 ZT12-15 0 0 0 ZT16-19 6.770485000000001 6.770485000000001 6.770485000000001 ZT20-23 11.12585 11.12585 11.12585