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): 310 124 190 110 52 20

a. Plot the data with a regression line and perform a regression with the appropriate statistical test in StatCrunch. Copy and paste your graph and regression output into your Word document for full credit.

b. What is the correlation coefficient r and what is the coefficient of determination here? What does the coefficient of determination mean in this case?

c. Is there a statistically significant correlation between the dose and cholesterol in this sample? What hypotheses did you test?

d. Using StatCrunch, what is the predicted cholesterol level for a person taking a dose of 7 mg? Copy and paste your regression output from StatCrunch into your Word document for full credit.