Divide into groups of three or four students. Investigate the relationship between two variables by collecting your own paired sample data and using the methods of Section 13-6 to determine whether there is a correlation. Suggested topics:
• Is there a relationship between taste and cost of different brands of chocolate chip cookies (or colas)? (Taste can be measured on some number scale, such as 1 to 10.)
• Is there a relationship between salaries of professional baseball (or basketball or football) players and their season achievements?
• Rates versus weights: Is there a relationship between car fuel-consumption rates and car weights?
• Is there a relationship between the lengths of men’s (or women’s) feet and their heights?
• Is there a relationship between student gradepoint averages and the amount of television watched?
• Is there a relationship between heights of fathers (or mothers) and heights of their first sons (or daughters)?