The following Table is taken from a research article.

TABLE 3. Average weekly class start times, sleep schedules, and alcohol consumption (means + SD) Class Schedule Early-morning Mid-morning Late-morning Dependent measure (n = 78) (n = 127) (n = 48) Weekdays Class Start Time (h:min) 08:56 + 20 10:12 + 25* 11:29 + 23* Bedtime (h:min) 00:38 + 62 00:55 + 56 01:01 +74* Rise Time (h:min) 07:59 + 38 08:43 + 50* 09:14 + 64* Total Sleep Time (h) 7.40 + 1.08 7.97 + 1.04* 8.36 + 1.36* Weekends Bedtime (h:min) 01:25 + 82 01:35 + 68 01:51 + 86 Rise Time (h:min) 10:09 + 88 10:10 + 81 10:23 + 86 Total Sleep Time (h) 8.38 + 1.30 8.14 + 1.39 8.15 +1.41 Bedtime Delay (min) 61 + 55 66 1 44 60 + 47 Weekend Oversleep (min) 90 + 64 72 + 62 80 +77 Alcohol use (Amount)+ 5.08 + 3.79 5.49 +3.76 6.56 + 5.21* Alcohol use (Frequency)+ 54.24 + 52.60 68.78 + 59.36 77.25 + 61.69* Alcohol use (Binge Drinking)+ 1.66 + 1.71 2.43 + 2.26* 2.17 +2.13 Bedtimes, Rise Times, and Total Sleep Times are given as weighted averages of weekday and weekend times obtained via sleep survey. Bedtime Delay and Weekend Oversleep are deviation scores (i.e., absolute values). The group mean is significantly different from the mean of the early-morning group (p <.05 use was measured as follows: amount="number" of drinks on a typical weekend night frequency="measured" scale from never to almost daily with responses converted times per year binge drinking="24" for women or men single occasion that s within few hours each other last wks>