A researcher believes that college students tend to maintain a healthier diet and, consequently, weight, during early adulthood than their peers not enrolled in college. In a study sponsored by...

A researcher believes that college students tend to maintain a healthier diet and, consequently, weight, during early adulthood than their peers not enrolled in college. In a study sponsored by Tullys, you are responsible for comparing the mean BMI of a random sample of PSU Berks students to the CDC database about the 18-21 age group across the nation.

What test would you use and why? (z test, independent t test, single sample t test, paired samples)