Grade 6 » Statistics & Probability | Common Core State Standards Initiative CCSS.Math.Content.6.SP.A.2. 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. CCSS.Math.Content.6.SP.A.3. Recognize that a measure of center for a numerical data set summarizes all of its values with a single number, while a measure of ...