### What is Partial Correlation?

What Questions Does Partial Correlation Help Us Answer? Partial correlation is a statistical method used to explore the relationship between two variables while controlling for the effects of one or more other variables. This helps us answer questions such as: Is the relationship between two variables still significant when we control for the effects of […]

### What Lessons Can We Learn From Anscombeβs Quartet?

What does Anscombe’s quartet teach us about the importance of visualizing data instead of relying on summary statistics when exploring data?Β  Anscombe’s quartet is a set of four datasets that have nearly identical summary statistics but very different visual patterns. This teaches us the importance of visualizing data instead of relying solely on summary statistics […]

### What is a Nonlinear Relationship?

What Are Examples of Nonlinear Relationships? Nonlinear relationships are relationships between two variables that cannot be described by a straight line. Instead, they may follow a curve or some other pattern. ππ π Imagine you’re playing with a yo-yo. If you pull the string a little, the yo-yo goes down a little. If you pull […]

### How to Interpret Correlation?

Understanding the Interpretation of Correlation ππ Why can we not say that one thing causes another based on a correlation coefficient or a strong correlation in a scatterplot? π€π€ While a correlation coefficient or a strong correlation in a scatterplot can suggest a relationship between two variables, we cannot say that one thing causes another […]

### What are the Different Types of Correlation Coefficients?

What Are the Different Types of Correlation Coefficients? There are different types of correlation coefficients that measure the strength and direction of the linear relationship between two variables. ππ π Pearson’s correlation coefficient (r) is the most commonly used and measures the degree of linear association between two continuous variables. It ranges from -1 to […]

### What is a Correlation Coefficient?

What Is a Correlation Coefficient?Β  A correlation coefficient is a number that measures the strength and direction of the linear relationship between two variables. ππ Think of it like a music producer π§ adjusting the volume on two different tracks. The correlation coefficient tells us how loud one track is compared to the other. π […]

### What is Correlation?

What Is Correlation? Correlation describes the degree of the linear relationship between two variables. ππ Imagine you’re playing basketball π, and you notice that the more you practice shooting free throws, the higher your accuracy becomes. That’s an example of a positive correlation between practice and accuracy. As the number of practice sessions increases, so […]

### How to Use a Parallel Coordinates Plot to Explore Correlation?

What Is a Parallel Coordinates Plot? A parallel coordinates plot is a graphical tool used to visualize the relationship between multiple variables. It’s like a musical score πΌ where each variable represents a different instrument, and the lines show how they play together. In a parallel coordinates plot, each variable is represented by a vertical […]

### How Do Outliers Impact Correlation?

How Do Outliers Impact a Correlation Coefficient? Outliers are data points that are significantly different from the other data points. They can have a big impact on a correlation coefficient, which is a number that measures the strength and direction of the linear relationship between two variables. ππ Imagine you’re in a class and you […]

### How to Use a Scatterplot to Explore Correlation?

Why Use a Scatterplot to Explore Correlation? A scatterplot is a graphical tool that displays the relationship between two variables. It’s like a map πΊοΈ that helps us see where different variables are located. A scatterplot conveys much more information than a single correlation coefficient because it shows us the actual data points and the […]