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 Has to be greater than 90% to make a statement like this.
E)A linear model is inappropriate for sociology studies.

Question

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 Has to be greater than 90% to make a statement like this. 
E)A linear model is inappropriate for sociology studies.

Quizplus · Accepted Answer

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. Additionally, the claim made by the student is not necessarily true as there are many other factors that contribute to life expectancy. A linear model may also not be the most appropriate for this type of study as the relationship between exercise and life expectancy may not be strictly linear.

A Sociology Student Does a Study to Determine Whether People