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Chapter 3 - Chapter 3 Descriptive Statistics Numerical...

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Chapter 3 Descriptive Statistics Numerical Methods
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Our goal? Numbers to help us answer simple questions. What is a typical value? How variable are the data? How extreme is a particular value? Given data on two variables, how closely do they move together?
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Measures of Central Tendency Here are three ways to identify a “typical” observation Mean – the arithmetic average Median – the middlemost value Mode – the most common value
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