For a certain set of data the Pearson correlation coefficien

For a certain set of data, the Pearson correlation coefficient was 0.87. It was calculated based on 50 data points. Answer the following questions, based off of this information.

(a) Let alpha be 0.05. Is the correlation coefficient significant?

(b) Using your answer from (a), is it reasonable to fit the regression line to the data?

(c) If you were to the predict a value of the dependent variable, would you use the regression line or the mean of all the values of the dependent variable?

Solution