Regina is interested in how many books rising 6th graders tend to read over the summer. What is a statistical question she could ask to generate numerical data?

How many hours did my older sister read in the summer before she went into 6th grade?
How many books are rising 6th graders in my town required to read over the summer?
What kinds of books do rising 6th graders tend to read the most?
What is the typical number of books that a rising 6th grader in the United States reads over the summer?