condition mean min max ZT0-3 25.9943 16.002850000000002 31.283549999999998 ZT4-7 9.7359 9.7359 9.7359 ZT8-11 7.42234 7.42234 7.42234 ZT12-15 12.231575 11.677050000000001 12.7861 ZT16-19 9.343225 9.343225 9.343225 ZT20-23 24.34385 24.34385 24.34385