Learn how to create and interpret a normal probability plot in SPC, and what to do if your data is not normal.

The cutting process is in statistical control. As a preliminary step in a capability analysis of the process, it is decided to check whether the distances are normally distributed. The following ...

The process producing the rods is in statistical control, and as a preliminary step in a capability analysis of the process, you decide to check whether the diameters are normally distributed. The ...

The probability plot in Figure 1 is an example of this type of scenario. In this case, normality clearly cannot be assumed; the p -value is less than 0.05 and more than 5 percent of the data ...

The quality control process for a company involves many important steps such as testing and analyzing data from different sources. To effectively do this, you must understand what normal ...

Add a description, image, and links to the normal-probability-plot topic page so that developers can more easily learn about it ...

The smaller the number under Prob<W, the less likely it is that the data comes from a normal distribution. In this case - since Prob<W is equal to 0.0002 - we see that the data are not likely to have ...