Which of the Following Statements About a Discrete Random Variable

question 64

Multiple Choice

Which of the following statements about a discrete random variable and its probability distribution is true?

• A) Values of the random variable can never be negative.
• B) Negative values of f(x) are allowed if ∑f(x) = 1.
• C) Values of f(x) must be greater than or equal to zero.
• D) The values of f(x) increase to a maximum point and then decrease.

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Definitions:

Sketch Graph

The act of drawing a rough outline or diagram of a graph, typically to illustrate behavior or solutions.

Equation

A statement that asserts the equality of two expressions, typically including one or more variables.

Graphing Calculator

A handheld calculator that is capable of plotting graphs, solving simultaneous equations, and performing other tasks with variables.

Standard Viewing Window

The default range of values on the x-axis and y-axis that are displayed on a graphing calculator's screen or graphing software.