A Study Has 18 Participants in the Experimental Group and 7

question 18

Multiple Choice

A study has 18 participants in the experimental group and 7 participants in the control group. What is the harmonic mean of these sample sizes?

• A)18/(18 + 7)+ 7/(18 + 7)= .6
• B)(2)(18)/(18 + 7)+ (2)(7)/(18 + 7)= 2.0
• C)(2)(18)(7)/(18 + 7)= 10.08
• D)(18 + 7)2/(18 + 7)= 25

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Definitions:

Readiness Potential

A measure of brain activity indicating a volitional action is being prepared before the action is consciously initiated.

Movement

Involves the change in position of an object or person, often referring to physical actions and activities.

Dot Location

A task or experiment setup where individuals are asked to identify or remember the location of dots on a screen or surface, often used in studies on spatial memory.

REM Sleep

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