For the following questions identify the response variable(s), explanatory variable(s) and classify each variable as quantitative or categorical. If categorical indicate whether or not it is binary. Finally, identify the appropriate model/test (test of proportions (p tests, chi-square), test of means (t-test, ANOVA), (simple or multiple) linear regression). If no test is valid or appropriate explain why.

1.) Can the weight of a hawk be modeled based on the species of hawk? Data were collected on 3 different species of hawk.

2.) Are there differences between obesity and marital status? Researchers analyzed data from the National Longitudinal Study of Adolescent Health and categorized the participants based on their Obesity (defined as having a BMI of 30 or more) and whether they were dating, cohabitating, or married.

3.) Are the number of calories in a cereal associated with the sugar content? The number of calories and number of grams of sugar per serving were measured for 36 breakfast cereals.

4.) Can active pulse rates be modeled using resting pulse rate, weight, and amount of weekly exercise? Active pulse rates (in beats per minute) after climbing several flights of stairs, resting pulse rates (in beats per minute), weight (in pounds), and amount of exercise (in hours per week) were obtained from 232 students taking a statistics course.