Statistics Exercise V: Correlation and Regression These weekly exercises provide the opportunity for you to understand and apply statistical methods and analysis. Unless otherwise stated, use 5% (.05) as your alpha level (cutoff for statistical significance). #1. What information does a correlation coefficient convey? #2. State whether each of the following is an example of a positive correlation or a negative correlation. Higher education level is associated with a larger annual income. Increased testosterone is associated with increased aggression. The smaller the class size, the more students believe they are receiving a quality education. Rising prices of apples are associated with the sale of fewer apples. #3. Which is the predictor variable (X) and which is the criterion variable (Y) for each of the following examples? A researcher tests whether the size of an audience can predict the number of mistakes a student makes during a classroom presentation. A military officer tests whether the durat