Quiz 1

1. The Postal Service uses​ five-digit ZIP codes to identify locations to assist in delivering mail. Complete parts a and b below.

​a) In what sense are ZIP codes​ categorical?

1. There are exactly as many values of ZIP codes as there are cases.
2. Each ZIP code corresponds to a geographical region.
3. The values of ZIP codes are text and those values tell what category the particular case falls into.
4. ZIP codes can be used to measure distances between locations.

​b) Is there any ordinal sense to ZIP​ codes? In other​ words, does a larger ZIP code tell you anything about a location compared to a smaller ZIP​ code?

1. Yes, since smaller ZIP codes correspond to more​ population-dense regions.
2. No, there is no ordinal sense to ZIP codes.
3. Yes, since ZIP codes increase from east to west.
4. Yes, since ZIP codes increase from west to east.
5. Yes, since the first digit of a ZIP code corresponds to a set geographical region.