The Lengths of Human Pregnancies Are Normally Distributed with a Mean

question 134

Multiple Choice

The lengths of human pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. What is the probability that a pregnancy lasts at least 300 days?

• A)0.0179
• B)0.4834
• C)0.0166
• D)0.9834

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Definitions:

REM Sleep

A stage of sleep characterized by rapid eye movement, during which most vivid dreaming occurs, and is considered important for learning and memory processes.

Electroencephalograph

An instrument used to record the electrical activity of the brain.

Beta Waves

Beta waves are a pattern of brain electrical activity signifying an awake, alert, and focused state often associated with active concentration and thinking.

REM Sleep

A stage of sleep characterized by rapid eye movements, vivid dreams, and increased brain activity.