John Has Been Having Difficulty Falling and Staying Asleep for the Past

question 247

Multiple Choice

John has been having difficulty falling and staying asleep for the past few months. He has lost some of his appetite, lost some weight, and feels physically fatigued a great deal of the time. These are all examples typically associated with major depression, called ________ symptoms.

• A) motivational
• B) cognitive
• C) mood-state
• D) somatic

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Definitions:

Wilcoxon Test

A non-parametric statistical test used to compare two paired groups and determine whether their population mean ranks differ.

Expected Value

A measure in probability and statistics indicating the average outcome of a random event, calculated as the weighted average of all possible values.

Null Hypothesis

A statement or idea that suggests there is no statistical significance or effect between certain observed phenomena or variables.

Wilcoxon Rank Sum Test

A nonparametric statistical test that compares two independent samples to assess whether their populations have the same distribution.