What would happen if we measured x in feet and continued to measure y in inches ...

  

(1) There are two variables called x and y. Both are measured in inches. There is a perfect correlation. What would happen if we measured x in feet and continued to measure y in inches. Would the correlation change and if so how?

(2) Two variables have a correlation of 0.985. If we add an outlier to the data and then calculate the correlation again…

a. Could the outlier cause the correlation to significantly change? Explain.

b. Would the outlier necessarily cause the correlation to change or could the correlation change very little or not at all? Explain.