Let X Be Normally Distributed with Mean µ = 250

question 64

Multiple Choice

Let X be normally distributed with mean µ = 250 and standard deviation σ = 80. Find the value x such that P(X ≤ x) = 0.0606.

• A) −1.55
• B) 1.55
• C) 126
• D) 374

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Definitions:

Expiratory Reserve

The volume of air that can be forcefully exhaled after the end of a normal tidal expiration.

Intercostal Muscles

Muscles located between the ribs that aid in the process of breathing by controlling the expansion and contraction of the chest cavity.

Elevate Ribs

The action of lifting the ribs through muscle contraction, which increases the volume of the thoracic cavity to aid in inhalation.

Emphysema

A long-term, progressive disease of the lungs characterized by a loss of elasticity and enlargement of air spaces, leading to breathing difficulties.