The Relationship Between the Standard Normal Random Variable Z and Normal

question 19

Multiple Choice

The relationship between the standard normal random variable z and normal random variable X is that:

• A)Only the normal random variable X is continuous.
• B)Only the standard normal variable z is continuous.
• C)The standard normal variable z counts the number of standard deviations that the value of the normal random variable X is away from its mean.
• D)The values of the standard normal random variable z cannot be negative.
• E)The values of the normal random variable X cannot be negative.

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Definitions:

Orbicularis Oris

A muscle around the mouth that controls the movements of the mouth and lips, crucial in forming facial expressions and speech.

Eyebrows

The strips of hair growing above the eyes, playing a role in facial expression, communication, and protection of the eyes from sweat and debris.

Buccinators

The buccinator muscles are thin, flat muscles of the cheeks, involved in blowing, sucking actions, and aiding in mastication by pressing the cheeks against the teeth.

Platysma

A thin, superficial muscle located in the neck, responsible for lowering the jaw and drawing the lower lip and corners of the mouth down.