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Anna has noticed that for the past three weeks she is unable to sleep for more than five hours at a time,even though she used to regularly get eight hours of sleep per night.She wakes early in the morning and just can't fall back to sleep.What has Anna developed
Population
The complete set of individuals or items that are the subject of a statistical study.
Sample
A subset of a population selected for measurement, observation, or questioning, to provide statistical information about the population.
Nondirectional Hypothesis
A hypothesis that predicts the existence of a relationship, not its direction.
Return on Equity
A measure of financial performance calculated by dividing net income by shareholders' equity, indicating how effectively management uses equity investments.
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