6) Wells Fargo is studying the variability in ATM usage between younger customers and senior citizens. The bank wishes to know whether there is a difference in variability in order to run an appropriate two sample t-test to find out if younger customers use the ATM more frequently than its senior citizen customers. Determine whether there is a difference in variability between the two groups and based on your results, make a recommendation about which two sample t-test to use. Under 25 10 10 11 15 11 10 9 Over 60 4 8 7 7 A 5 1 4 10 5 (Ctrl) . gate Focus