Which test can I use for smaller data sets (<5 in a single cell, <20 in group, although N>500) but for larger grids (3x4, 4x5 etc.)?
Chi-squared test can be used for larger grids but not for smaller data sets as you have to use the Fischer or Yates correction. Fischer or Yates correction however seem to be reserved for 2x2 grids.
I was searching answer to this problem for ages and cannot find an answer.