Exhibit 17

question 62

Multiple Choice

Exhibit 17.5.An over-the-counter drug manufacturer wants to examine the effectiveness of a new drug in curing an illness most commonly 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 has been collected. Assuming the variables: Effectiveness = the response variable measured on a scale from 0 to 100,
Age = the age of a patient (in years) ,
Drug = a binary variable with 1 for the new drug,and 0 for the old drug,the regression model,
Effectiveness = β₀ + β₁Age + β₂Drug + β₃Age × Drug,is considered,and the following Excel results are available: Refer to Exhibit 17.5.What is the percentage of variations in Effectiveness explained by the estimated model?

• A)97.61%
• B)95.27%
• C)94.63%
• D)32.35%

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Definitions:

Fertile Offspring

Offspring that are capable of reproducing, indicating successful genetic combination and viability.

Species

A fundamental category in biological taxonomy, defined as a group of organisms capable of interbreeding and producing fertile offspring.

Evolution

The method through which various types of living beings are believed to have evolved and varied from their early ancestors over the Earth's history.

Biological Sciences

A branch of science concerned with the study of life and living organisms.