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.,Display numerical data in plots on a number line, including dot plots, histograms, and box plots.,Reporting the number of observations.,Describing the nature of the attribute under investigation, including how it was measured and its units of measurement.,Relating the choice of measures of center and variability to the shape of the data distribution and the context in which the data were gathered.