The Null Hypothesis of the Wilcoxon Signed-Rank Test Can Be

question 22

Multiple Choice

The null hypothesis of the Wilcoxon signed-rank test can be stated in words as follows:

• A)The rank sum for each group will be equal,and any differences are due to sampling error.
• B)The expected value for each rank sum will be equal to the average of the rank sums for the positive and negative differences.
• C)The expected value for difference scores will be less than the average of the rank sums for the positive and negative differences
• D)The rank sum for each group will be less than the total rank sum.

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Definitions:

Delta Waves

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Stage 4 Sleep

Stage 4 Sleep, also known as delta sleep or deep sleep, is a stage of sleep characterized by slow brainwaves and minimal body activity, where restorative and growth processes occur.

REM Behavior Disorder

A rare disorder in which the mechanism that blocks the movement of the voluntary muscles fails, allowing the person to thrash around and even get up and act out nightmares.

EEG Record

A graphical record of electrical activity in the brain, measured by electrodes placed on the scalp, used in diagnosing neurological conditions and in neuroscience research.