condition mean min max ZT0-3 5.2586925 4.996365 5.52102 ZT4-7 4.4267900000000004 4.4267900000000004 4.4267900000000004 ZT8-11 3.473345 3.473345 3.473345 ZT12-15 0 0 0 ZT16-19 4.414 4.414 4.414 ZT20-23 3.3393 3.3393 3.3393