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.

---

Definitions:

Collaborative Technologies

Digital tools and platforms that facilitate cooperation and teamwork among users, regardless of their physical location.

Groupware

Software designed to facilitate collaborative work or projects by multiple users within different locations.

Collaborate

To work jointly with others or together especially in an intellectual endeavor.

E-Leadership

Leadership practice facilitated through electronic means, where influence and direction are exercised through digital communication tools and platforms.