Stella is interested in determining whether people have gotten more or less exercise since going under social distancing protocols. Zhe asks people, "Please estimate the number of hours of exercise you got each week before social distancing took effect" and then asks, "Please estimate the number of hours of exercise you got each week after social distancing took effect." Both of these variables are positively skewed. What is the goal of zer research? Question 9 options: a) To determine potential differences between groups b) To determine a potential relationship between variables