If We Wish to Use a Regression Line to Determine

question 23

Multiple Choice

If we wish to use a regression line to determine the effect of multiple treatment levels , why can't we just plot the average outcome for each treatment level and "connect the dots?"

• A) Connecting the dots generally will not form a line.
• B) Using averages for each treatment level will generally create bias.
• C) This will cause us to have too few equations to solve for our unknown parameters.
• D) We cannot use a regression line to measure the effects of multiple treatments.

---

Definitions:

Gastric Bypass

A surgical procedure that helps with weight loss by changing how the stomach and small intestine handle the food you eat, causing you to absorb fewer calories.

Massive Weight Loss

A significant reduction in body weight, typically through surgery, diet, or exercise, often to improve health.

Fruits and Vegetables

Plant-derived food items rich in vitamins, minerals, fiber, and antioxidants, essential for a balanced diet and good health.

Overweight Children

Young individuals having a body mass index (BMI) above the normal range for their age and height, indicating excess body fat.