Suppose a population of scores x is normally distributed with 
and 
Use the standard normal distribution to find 
. Round your answer to four decimal places.
Definitions:
Polysomnogram
A comprehensive recording of the biophysiological changes that occur during sleep, used to diagnose sleep disorders.
Sleep assessment
The evaluation of sleep patterns, quality, and disorders, typically involving the use of specific tools or tests and a detailed patient history.
Visual analog scale
A measurement instrument for subjective characteristics or attitudes that cannot be directly measured, often used for assessing pain.
Anxiety
A mental health disorder characterized by excessive fear, worry, or unease that can interfere with daily activities.
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