A question for which we do not expect to get a single answer but rather a variety of answers
In other words, when we ask this type of question, we want to know what the distribution or tendency of answers is. Now let's take a look at the given question.
How many hours do sixth-grade students use the Internet each week?
There are multiple possible number of hours students use Internet each week so we would get a variety of answers to that question. Then we could, for example, describe the tendency of answers to see what the most popular number of hours is. This means that this is a statistical question.
