The measurements you are to take are your height (in millimeters) just before you go to sleep at night and just after you wake up in the morning, as well as how many hours of sleep you had that evening. Make these measurements in bare feet, and I suggest that you tape a paper ruler onto a wall that you can stand in front of, and use a book or other flat, hard surface placed on top of your head to determine the height. A ruler you can use is available at http://www.vendian.org/mncharity/dir3/paper_rulers/. In doing this, tape the paper ruler on a wall so the zero edge is below the top of your head, and measure (using another ruler), the height to the zero edge in millimeters. We are most concerned in this set of observations in the difference in heights between evening and morning, not in the precise height (so don't worry if the overall height is not correct to the millimeter).
In compiling your results, use the following format, with spaces between each measurement:
Day number
Your 3-digit class ID#
Your Gender (1=female,2=male)
Your age in years
Height at night
Hours of sleep
Height in morning
So an example result would be:
1
899
1
20
1575
8
1577
2
899
1
20
1574
6
1575
3
899
1
20
1574
7
1577
4
899
1
20
1575
4
1574
Email your data set to your TA as a text file, not in Word, Excel or some other format.