A dietician is interested in finding out if the mean number of caffeinated beverages differs for students of varying stress levels. When students completed the survey, they indicated their stress level as "not too stressed", "a little stressed", or "very stressed". For this comparison, we will only consider the caffeine data available for the 1 = 47 students who feel "not too stressed" and for the 2 = 94 students who feel "very stressed".