Two years ago, the results of a questionnaire administered to university students showed that the average number of cigarettes smoked daily by men was 8.3 with a standard deviation of 3.7. The director of the medical services office wants to determine if smoking habits have changed in this group. For this, she obtains the following information from a random sample of male students regarding the number of cigarettes they smoke daily: mean = 7.7, n = 108. Carry out the corresponding hypothesis test using .05 as the significance level. (Each of the 6 steps is worth 2 points for a total of 12 points.)