Recognize a statistical question as one that anticipates variability in the data related to the question and accounts for it in the answers. For example, “”How old am I?”” is not a statistical question, but “”How old are the students in my school?”” is a statistical question because one anticipates variability in students’ ages. Understand that a set of data collected to answer a statistical question has a distribution which can be described by its center, spread, and overall shape. Recognize that a measure of center for a numerical data set summarizes all of its values with a single number, while a measure of variation describes how its values vary with a single number.