Chapter 2 - Definitions and Scaling

Chapter 2 - Definitions and Scaling - Chapter 2:...

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Chapter 2: Definitions and Scaling
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Independent vs. Dependent Variables Independent Variables - are variables that are manipulated or controlled. Dependent Variables - variables that researchers observe to see if changes result from manipulation of independent variables
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A scientist is studying the thickness of plant roots, some plants he gives water with magnesium in it some plants he gives plain water to then measures the thickness of the plant roots in mm.
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A doctor wants to study the effects of eating eggs daily on white blood cell production in children with leukemia.
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A researcher wants to study the effects listening to a sounds of nature CD before bed and the amount of REM sleep a person has at night.
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Population vs. Sample Population - is a complete collection of interest to study Sample - is a subset of the population on which data is collected
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Descriptive Vs. Inferential Statistics Part 1: Descriptive Statistics - statistical techniques used to illustrate or describe data
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This note was uploaded on 04/27/2009 for the course HUDM 4120 taught by Professor Moore during the Summer '08 term at Columbia.

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Chapter 2 - Definitions and Scaling - Chapter 2:...

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