According to the University of Chicago, as men age, their cholesterol level goes up. A new drug (XAB) is being tested to determine if it can lower cholesterol in aging males and at what dose. The data for the first test subject is below: Dose (mg) 2 3 5 6 8 10 Cholesterol level (mg/dL) 310 124 201 110 52 20
Is there a statistically significant correlation between dose and cholesterol level in this case?
What is the predicted cholesterol level for a person taking a dose of 4 mg? What about if they are not taking the drug at all (0 mg)?