The normal probability plot is a graphical technique to identify substantive departures from normality. This includes identifying outliers, skewness, kurtosis, a need for transformations, …

Probability plots are a powerful tool to better understand your data. In this post, I intend to present the main principles of probability plots and focus on their visual interpretation using some real …

May 13, 2024 · A normal probability plot is a graphical technique to assess whether a dataset follows a normal distribution. It plots the quantiles of the dataset against the quantiles of a …

Apr 16, 2019 · In this article, I have tried to explain key concepts of probability plots on the examples of the P-P and Q-Q plots. You can find the notebook with the code used for …

Making a histogram of your data can help you decide whether or not a set of data is normal, but a normal probability plot is more specialized: it graphs z-scores (normal scores) against your …

Mar 3, 2022 · The probability plot (Chambers et al., 1983) is a graphical technique for assessing whether or not a data set follows a given distribution such as the normal or Weibull. The data …

Jul 23, 2025 · In this plot, data is plotted against the theoretical normal distribution plot in a way such that if a given dataset is normally distributed it should form an approximate straight line. …

In general, there are three plot types: Percentile plots are the simplest plots. You simply plot the data against their plotting positions. The plotting positions are shown on a linear scale, but the …

Jun 19, 2025 · The biggest problem with a normal probability plot is that it’s hard to read, especially if you’re not used to them. So let’s take a moment and walk through exactly how …

Proabability plots are a general term for several different plotting techniques. One of these techniques is a graphical method for comparing two data sets and includes probability …