Tag Archives: Scatterplot

Anscombe’s Quartet

Here’s an interesting example of why you should never just look at an r value and a regression model without looking at the scatterplot first. Anscombe’s Quartet consists of four data sets. Each has the same sample size and nearly the same mean and standard deviation for the x and y variables, r values, and regression coefficients. But […]

Scatterplots

A scatter plot is a graph representing the relationship between two quantitative variables. Each data point is represented by a dot on a cartesian plane with its position determined by its value of the two variables. For example, if I were to create a scatter plot using the variables of height and weight, the position of […]

Scatterplots

A scatter plot is a graph used to visually examine the relationship between two quantitative variables that are plotted on the x- and y- axis, respectively. Points are plotted in relation to both variables, and from this a correlation can be determined.  A “line of best fit” can be used further in analysis of the […]