You want to study the effects that using a calculator has on the time it takes to complete at math test at your school. Design an observational study to investigate the link between calculator use and time needed to complete exams. Assume you can interview students in any math teacher's class in your school. The steps for designing a study are: Step 1: Determine the focus of the study (the important variable and what information must be gathered in order to answer the main question). Step 2: Develop a plan to collect the data. Step 3: Determine the most appropriate sampling method (Once the design is complete, you would then collect the data, interpret the data, and report the findings of the study)