Positive and Negative Association

Let’s discuss the difference between positive association and negative association when describing the relationship between two variables. What do we mean by the least-square criterion? Give a general description of how the least-square criterion is involved in the construction of the least-square line.  Why do we say the least-squares line is the “best-fitting” line for the data set? Use the Internet and find a magazine or journal article in your field of major interest wherein the content of this chapter (Correlation and Regression – chapter 6) could be applied.  List the variables used, method of data collection, and the general type of information and conclusion drawn.