For each of the following, indicate whether the variable of interest is nominal or interval.
a. Your marital status.
b. Whether you are a U.S. citizen.
c. Sally's travel time from her dorm to the student union on campus.
d. The amount of time you spent last week on your homework.
e. The number of cars parked in a certain parking lot at any given time.
f. Kate's favorite brand of sneakers.
Question 2
The joint effect of two variables acting together is called _____.
a. autocorrelation
b. interaction
c. serial correlation
d. joint regression
Variable expressivity
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