Question

What is the maximum value that a marginal relative frequency can be? Explain.

Answer 1

The maximum value it can be would be 100%.  The only times that it could be this high is when there is only a class on the frequency distribution table.  Another way, is that there is only one column variable on the table (& or if there is only one row.)  Any other time is will be less, but the maximum stays 100%.