A Sociology Student Does a Study to Determine Whether People

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

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