There were not random queries. In fact, they were picked because we felt they were likely to trigger a knowledge panel.
For a good believable test your sampling methodology is very important. In fact, you want to have a random sample that is free of biases instead of somebody cherry picking queries. Perhaps you may do random weighted sample of queries with weights = frequency which represents usage pattern more closely. In any case, it's very important to describe your sampling methodology or otherwise this kind of testing has little value.