1. Briefly describe the connections among the following: covariation, scatter diagram, correlation, and linear relationship.
2. Indicate, with the use of a scatter diagram, the general shape of the scatter of data points in each of the following cases: (a) a strong positive correlation, (b) a weak negative correlation, (c) no correlation, (d) a correlation of -
3. What are the scaling assumptions assumed by Pearson product moment correlation?