Which of the Following Statements About a Discrete Random Variable

question 13

Multiple Choice

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

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

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Definitions:

Bending Light Rays

The refraction of light that occurs when its speed changes as it passes from one medium to another, causing the light to change direction.

Fatigue

A state of physical or mental weariness resulting from exertion, reducing efficiency and capacity for work.

Action Potentials

Rapid and temporary electrical impulses that travel across the membrane of nerve cells, facilitating neuronal communication.

Synapse

The junction between two neurons or between a neuron and muscle fiber, where electrical or chemical signals are transmitted.