A useful device for determining whether the distribution of observed incomes is consistent with a theoretical or assumed distribution is the
A) cumulative distribution function.
B) matrix.
C) frequency polygon.
D) contingency table.
E) a and c.

Question

Quizplus · Accepted Answer

The cumulative distribution function (CDF) and the frequency polygon are both useful tools for determining if the distribution of observed incomes is consistent with a theoretical or assumed distribution. The CDF shows the probability that a variable takes a value less than or equal to a certain value, which is useful for comparing distributions. The frequency polygon, a graphical tool, represents the distribution of a dataset and can visually compare it to a theoretical distribution.

A Useful Device for Determining Whether the Distribution of Observed