Describe the difference between the calculation of population standarddeviation and that of sample standard deviation.

30 Statistics: The Art and Science of Learning from Data MODULE 9: SAMPLING Chapter 4 Gathering Data In chapters 2 and 3, we have learned to look at data and summarize it, which is sometimes calledexploratory data analysis. We haven’t made a formal attempt to generalize what these data showed us to larger groups. That is the purpose of statistical inference, and it is crucial then that our data represents the larger group. Statistical inference makes a statement about the population, based on a random and representative sample and includes a measure of how confident we are in the statement. In this chapter we learn how to gather good data to answer the question of interest. In Chapters 5, 6and 7, we learn the behaviorof data that comes from a random sample. In Chapters 8, 9 and 10 we