A survey was taken of students at a large university in the fall of 2003; among other things, students were asked to report how many credits they were taking and how many hours they had slept the night before.
a. Use software to access the student survey data. Find the correlation between credits and hours slept, and describe the relationship as strong and negative, weak and negative, nonexistent, weak and positive, or strong and positive.
b. Students completed this survey during their first week of classes. Explain how this might have an impact on the relationship between credits taken and hours slept.