A Sociology Student Does a Study to Determine Whether People $\mathrm { R } ^ { 2 }$

question 44

Multiple Choice

A sociology student does a study to determine whether people who exercise live longer.He claims that someone who exercises 7 days a week will live 15 years longer than someone who doesn't exercise at all.

• A)Predictions based on a regression line are for average values of x and y.The actual average life expectancy changes every year so an accurate prediction is impossible.
• B)There is nothing wrong with the interpretation.
• C)Predictions based on a regression line are for average values of y for a given x.The actual life expectancy will vary around the prediction.
• D)The \(\mathrm { R } ^ { 2 }\) has to be greater than 90% to make a statement like this.
• E)A linear model is inappropriate for sociology studies.

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Definitions:

Desirable One

An option or choice that is preferred or sought after due to its appealing qualities or advantages.

Structural Coherence Plan

A planned approach ensuring that the various parts of a text or system are logically connected and unified.

Explanations

Statements or accounts that make something clear or understandable, often detailing causes, contexts, or reasons.

Introductions

The initial section of a document or speech that sets the stage for the content to follow, typically outlining the purpose or main topics.