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.

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Definitions:

Adverse Effect

An unintended, harmful reaction to a drug or therapy that occurs at a normal or recommended dosage.

Eye Ointment

A medication in an ointment form, applied directly to the eye to treat or prevent eye infections and diseases.

Discarding Medication

The process of safely and properly disposing of unused, expired, or unwanted medicines to prevent harm and environmental pollution.

Physiological Changes

Alterations in the normal functions of the body, which may occur due to aging, diseases, or environmental factors.