Question

find the correlation coefficient (r) from the table provided. (Hint: y1-mx1+b) b) Describe two characteristics the correlation coefficient tells you about the resulting graph and trendline.

Answer 1

Problem

Solution

Part a

For this case the correlation coeffcient using R with the following code:

And for this case the correlation coefficient calculated is:

r = -0.4816

Part b

For this case since the correlation coefficient is negative we can conclude that the relationship between x and y is inverse and that means when x increase y decrease.

And is a moderate inverse correlation since is near to -0.5