Histograms, Variables, Elements

1) A histogram that has a long tail to the right shows a distribution that is:
A. Skewed to the right
B. Shewed to the left
C. Normal
D. Centered

2) A person's telephone area code is an example of a(n) _____________ variable.
A. Ratio
B. Interval
C. Nominative
D. Ordinal

3) A set of all elements we wish to study is called a _______.
A. Frame
B. Census
C. Sample
D. Population