Chapter 3 words

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scatterplot
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a graphic representation of bivariate (2 variable) data as a set of points in the plane that have Cartesian coordinates equal to corresponding values of the two variates.

response variable
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(statistics) a more modern term for dependent variable (output or effect)

expanatory variable
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a statistical term for independent variable (input or 'cause' variable)

regression outliers
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values that seem a greater distance away from the regression equation (line or curve)

least squares method
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a method creating a regression line or estimating values from a set of observations by minimizing the sum of the squares of the differences between the observations and the values to be found.

correlation
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the degree to which two or more attributes or measurements on the same group of elements show a tendency to vary together.

contingency table
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the frequency distribution for a two-way statistical classification.

lurking variable
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a variable that is not included as an explanatory or response variable in the analysis but can affect the interpretation of relationships between variables.

regression line
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the frequency distribution for a two-way statistical classification.

simpson's paradox
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is a paradox in probability and statistics, in which a trend appears in different groups of data but disappears or reverses when these groups are combined. It is sometimes given the impersonal title reversal paradox or amalgamation paradox.


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