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Data Science

476What is Pearson Correlation?
477Interpreting the Correlation Coefficient
478The Formula for Pearson's r
479Assumptions of Pearson Correlation
480Scatterplots and Visual Assessment
481Outliers and Their Impact on r
482Calculating Pearson Correlation in Practice
483Coefficient of Determination (r²)
484When Pearson Correlation Fails
485Limitations of Pearson Correlation
486Spearman's Rank Correlation Coefficient
487When to Use Spearman vs Pearson
488Computing Spearman Correlation
489Kendall's Tau Correlation Coefficient
490Kendall's Tau vs Spearman's Rho
491Handling Ties in Rank Correlations
492Practical Applications of Rank Correlations
493The Fundamental Difference: Association vs Cause-and-Effect
494Spurious Correlations and Coincidence
495Confounding Variables
496Reverse Causality
497The Third Variable Problem
498Bradford Hill Criteria for Causation
499Why Controlled Experiments Are Needed
500Hypothesis Testing Framework for Correlation
501T-Test for Pearson Correlation Significance
502Permutation Tests for Correlation
503Confidence Intervals for Correlation Coefficients
504Testing Difference Between Two Correlations
505Sample Size and Power for Correlation Tests
506Introduction to Partial Correlation
507Computing Partial Correlation Coefficients
508Interpreting Partial Correlations
509Confounding Variables and Control
510Correlation Matrices: Construction and Display
511Reading and Interpreting Correlation Matrices
512Testing Significance in Correlation Matrices
513Applications: Feature Selection and Multicollinearity

Data Science

476What is Pearson Correlation?
477Interpreting the Correlation Coefficient
478The Formula for Pearson's r
479Assumptions of Pearson Correlation
480Scatterplots and Visual Assessment
481Outliers and Their Impact on r
482Calculating Pearson Correlation in Practice
483Coefficient of Determination (r²)
484When Pearson Correlation Fails
485Limitations of Pearson Correlation
486Spearman's Rank Correlation Coefficient
487When to Use Spearman vs Pearson
488Computing Spearman Correlation
489Kendall's Tau Correlation Coefficient
490Kendall's Tau vs Spearman's Rho
491Handling Ties in Rank Correlations
492Practical Applications of Rank Correlations
493The Fundamental Difference: Association vs Cause-and-Effect
494Spurious Correlations and Coincidence
495Confounding Variables
496Reverse Causality
497The Third Variable Problem
498Bradford Hill Criteria for Causation
499Why Controlled Experiments Are Needed
500Hypothesis Testing Framework for Correlation
501T-Test for Pearson Correlation Significance
502Permutation Tests for Correlation
503Confidence Intervals for Correlation Coefficients
504Testing Difference Between Two Correlations
505Sample Size and Power for Correlation Tests
506Introduction to Partial Correlation
507Computing Partial Correlation Coefficients
508Interpreting Partial Correlations
509Confounding Variables and Control
510Correlation Matrices: Construction and Display
511Reading and Interpreting Correlation Matrices
512Testing Significance in Correlation Matrices
513Applications: Feature Selection and Multicollinearity

← Data Science

Lesson 477 of 2,145·13. Correlation AnalysisPro lesson

Interpreting the Correlation Coefficient

Understanding r values from -1 to +1, strength categories (weak/moderate/strong), and what direction means.

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