An Over-The-Counter Drug Manufacturer Wants to Examine the Effectiveness of a New

question 112

Multiple Choice

An over-the-counter drug manufacturer wants to examine the effectiveness of a new drug in curing an illness most commonly found in older patients. Thirteen patients are given the new drug and 13 patients are given the old drug. To avoid bias in the experiment, they are not told which drug is given to them. To check how the effectiveness depends on the age of patients, the following data have been collected. The variables are Effectiveness = the response variable measured on a scale from 0 to 100,
Age = the age of a patient (in years) ,
Drug = a dummy variable that is 1 for the new drug and 0 for the old drug.
The regression model, Effectiveness = β₀ + β₁Age + β₂Drug + β₃Age × Drug, , is estimated and the following results are obtained. Which of the following is the predicted effectiveness of the old drug for a 62-year-old patient?

• A) 21.08
• B) 64.48
• C) 68.12
• D) 70.66

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Definitions:

Lost Appetite

A decreased desire to eat, which can be caused by various factors including illness, emotional stress, or other conditions.

Dissociative Identity Disorder

A mental disorder characterized by the presence of two or more distinct personality states or identities within a single individual.

Controversial Disorder

A disorder that is subject to debate or dispute within the medical or psychological community, often due to unclear symptoms or overlapping diagnoses.

Distinct Personalities

The presence of two or more distinct and relatively enduring personality states within a single individual, often seen in dissociative identity disorder.