Discussion Thread: Correlation and Regression

Respond to the following short answer questions in Chapter 8 from Morgan, Leech, Gloeckner, & Barrett textbook:

D6.8.1 Why would we graph scatterplots and regression lines?

D6.8.2 In Output 8.2, (a) What do the correlation coefficients tell us? (b) What is r2 for the Pearson correlation? What does it mean? (c) Compare the Pearson and Spearman correlations on both correlation size and significance level; (d) When should you use which type in this case?

D6.8.5 In Output 8.5, what do the standardized regression weights or coefficients tell you about the ability of the predictors to predict the dependent variable?