Answer:
The most appropriate statistical analysis would be multiple regression.
Step-by-step explanation:
Multiple regression is used to predict the value of a variable (dependent variable) based on the values of two or more other variables (independent variables).
In the given scenario, the student wants to predict the salaries of catwalk models. Hence, salary is the dependent variable. As per the student's analysis, the salary is dependent on three other variables: age, years, and attractiveness. Hence, these are the independent variables.
A multiple regression model can thus effectively analyse how a model's age, years, and attractiveness affect her salary, and how these three factors account for the differences in the salary levels of catwalk models.