Statistics
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Boundless Statistics
Correlation and Regression
Statistics Textbooks Boundless Statistics Correlation and Regression
Statistics Textbooks Boundless Statistics
Statistics Textbooks
Statistics

Section 1

Correlation

Book Version 1
By Boundless
Boundless Statistics
Statistics
by Boundless
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8 concepts
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An Intuitive Approach to Relationships

Correlation refers to any of a broad class of statistical relationships involving dependence.

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Scatter Diagram

A scatter diagram is a type of mathematical diagram using Cartesian coordinates to display values for two variables in a set of data.

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Coefficient of Correlation

The correlation coefficient is a measure of the linear dependence between two variables $X$ and $Y$, giving a value between $+1$ and $-1$.

Coefficient of Determination

The coefficient of determination provides a measure of how well observed outcomes are replicated by a model.

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Line of Best Fit

The trend line (line of best fit) is a line that can be drawn on a scatter diagram representing a trend in the data.

Other Types of Correlation Coefficients

Other types of correlation coefficients include intraclass correlation and the concordance correlation coefficient.

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Variation and Prediction Intervals

A prediction interval is an estimate of an interval in which future observations will fall with a certain probability given what has already been observed.

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Rank Correlation

A rank correlation is a statistic used to measure the relationship between rankings of ordinal variables or different rankings of the same variable.

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