condition mean min max ZT0-3 3.6129675 3.59574 3.630195 ZT4-7 3.407255 3.407255 3.407255 ZT8-11 4.333295 4.333295 4.333295 ZT12-15 0 0 0 ZT16-19 4.295904999999999 4.295904999999999 4.295904999999999 ZT20-23 3.790095 3.790095 3.790095