You decide to use Monitoring the Future 2011 data to investigate how young Americans feel about alcohol (ATDRINK) and cigarette use (ATSMOKE). You obtain the data displayed below. You should note that ATDRINK measures how respondents feel about trying alcohol, while ATSMOKE measures how respondents feel about smoking one pack of cigarettes per day. These are substantially different questions, and you should consider that in your answer.

a. What would an appropriate measure of variability be for these variables? Why?
b. Calculate the appropriate measure of variability for each variable.
c. Was there more variability in attitudes toward trying alcohol or smoking one pack of cigarettes per day? Offer an explanation for your findings.