Are literacy rates related to population? To answer this question, a researcher gathers data on total population and percent of literacy from countries worldwide. The researcher determines if population size correlates positively with literacy rate.

Use the ASCII data in "j:\ling\msdos\otherdata\dfstudy5.txt" for a complete data list.

Data file: dfstudy.sav
Variables: COUNTRY, POP, LIT

COUNTRY      POP        LIT
Afghanistan    20500         29
Argentina      33900         95
Armenia        3700          98
Australia      17800        100
(data continue in dfstudy5.txt)  

Answer the following question:

1. What kind of data are in the three variables (nominal, ordinal, or interval)?