In this lesson, students work to deepen their understanding of standard deviation by interpreting it in various contexts. If time allows, the optional activity provides additional practice with interpreting dot plots.

Interpreting standard deviation in context is evidence that students are reasoning abstractly and quantitatively (MP2). The Information Gap activity may take students several rounds before students understand how to ask questions to gain the information they need to solve the problem (MP1). The information gap structure also allows them to refine the language that they use and to ask increasingly more precise questions until they get the information they need (MP6).