Which of the following types of data has no measure of variability?

A) Interval data.
B) Nominal data.
C) Bimodal data.
D) None of these choices.

When n - 1 is used in the denominator to compute variance, the data set

A) is a sample.
B) is a population.
C) could be either a sample or a population.
D) is from a census.