1. State College area blood bank center dataset includes the zip codes of the blood donors, such as 16801, 16802, 16803, 16804, and 16805.
What is your opinion: Is the zip code a categorical or quantitative variable? Explain your answer.
2. Suppose at the end of the semester, I decided to curve the grades of my class by adding 5 points to each student. What do you think will happen to the class mean and the median? How about the standard deviation and the IQR? Explain.