Question

I don't know how to solve this question could anyone help out? Thanks in advance!
You use a line as best fit for a set of data to make a prediction about an unknown value. The correlation coefficient for your data set is -0.015. How confident can you be be that your predicted value will be reasonably close to the actual value?

Answer 1

Take a look at this, and I think you will have your answer.

http://www.statisticshowto.com/probability-and-statistics/correlation-coefficient-formula/