A good test will include a few questions almost no-one can answer. That avoids the problem of having more than one 10⁄10 score.
More generally, a very good test will result in a uniform distribution of scores (rather than a bell curve), maximizing the information content of the score.
A good test will include a few questions almost no-one can answer. That avoids the problem of having more than one 10⁄10 score.
More generally, a very good test will result in a uniform distribution of scores (rather than a bell curve), maximizing the information content of the score.