3. What is the relationship between percentiles and quartiles? Interpret Q1, Q2, & Q3 as percentiles. (Hint: A number x is at the k^th percentile if k% of the data in the set is less than or equal to x.) [3]

4. What can you say about a data set when the "box" in the box plot is very wide but the "whiskers" do not go out very far from the box? [2]