# Textbook Notes for Statistics at University of South Carolina - Columbia (USC)

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## STAT 201 Chapter 2.1: Book Notes Chapter 2.1

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For some characteristics, we usually see variability among subjects. Other characteristics vary by subject and across time: ex. Amount of time studying
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## STAT 201 Chapter Notes - Chapter 3.4: Dependent And Independent Variables, Time Series, Regression Analysis

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Extrapolation= refers to using a regression line to predict y values for x values outside of observed range of data. Regression line can describe time
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## STAT 201 Chapter Notes - Chapter 2.2: Pareto Chart, Pareto Principle, Bar Chart

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Pareto chart= a bar graph with categories ordered by their frequencies from tallest to shortest bar. Pareto principle= states that a small subset of ca
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## STAT 201 Chapter Notes - Chapter 3.1: Dependent And Independent Variables, Standard Deviation, Scatter Plot

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Contingency table= display for 2 categorical units; rows list the categories of one variable, columns list categories of other variable. Cross tabulati
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## STAT 201 Chapter 2.4: Book Notes Chapter 2.4

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Range is simple to compute and easy to understand, but uses only extreme values and ignores other values. Not resistant and ignores numerical values of
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## STAT 201 Chapter Notes - Chapter 3: Dependent And Independent Variables, Linear Regression

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Regression line= predicts value for response variable y as a straight line function of x variable. Y denotes predicted value for y: y= a + bx. Y interc
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