1. The coefficient of determination between two variables is .64. Answer the following questions:
2. a.What is the Person correlation coefficient?
3. b.How strong is the relationship?
4. c.How much of the variance in the relationship between these two variables is unaccounted for?

1. Provide three examples of an association between two variables where a casual relationship makes perfect sense conceptually but since correlations do not imply causality makes little sense statistically until further examination?

1. A study examined the relationship between coffee consumption and level of stress for a group of 50 undergraduates. The correlation was 0.373 and a two-tailed test of significance was conducted at the 0.01 level of significance. First, is the correlation significant? Second, what's wrong with the following statement: "As a result of the data collected in this study and our rigorous analyses, we have concluded that if you drink less coffee, you will experience less stress"?

1. What type of statistical test would you use if the research question was:
2. a.Is milk (mL) intake related to a child's bone density (continuous measure)?
3. b.Does income ($) affect an individual's happiness (likert scale: unhappy, somewhat unhappy, neither unhappy or happy, somewhat happy, happy)?
4. c.Is weight status (severely underweight, underweight, normal weight, overweight and obese) related to employment (Yes/No)?