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Ch01A+Lecture

# Ch01A+Lecture - CHAPTER 1 An Introduction to Statistics and...

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CHAPTER 1 An Introduction to Statistics and Research Design: The Elements of Statistical Reasoning

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“The joy of statistics is its ability to satisfy this deep human impulse called curiosity by separating chance from pattern.” -Nolan & Heinzen, 2007
Two Branches of Statistics: Growing Our Knowledge about Human Behavior Descriptive statistics Organizing, summarizing, and communicating numerical information Inferential statistics Using samples to draw conclusions about a population

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Distinguishing Between a Sample and a Population Population of the world Population of United States or sample from the world Population of our school or sample from our country » Population of our class or sample from our school
Variable Any characteristic of the unit of study (typically a person) that varies.

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Variables Transforming observations into numbers An example: Stroop Test. Reaction Time. The time to say the colors compared to the time to say the word.
Stroop Demonstration Look at the following words and say each word as quickly as you can:

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WHITE RED GREEN BROWN
Now look at the following words and say the

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Ch01A+Lecture - CHAPTER 1 An Introduction to Statistics and...

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