Defining Non-normal Data. Normally distributed data is needed to use several statistical tools, such as individual control charts, Cp/Cpk analysis, t-tests, and the analysis of variance ().If a ...

Key Points Non-normal data is data that does not fall within a normal distribution. You can utilize techniques like the Box-Cox method to get the data within normality. Understanding how to use ...

The normal distribution describes a symmetrical plot of data around its mean value, where the width of the curve is defined by the standard deviation. It is visually depicted as the "bell curve." ...

However, if we were concerned that the data did not originate from a Normally distributed population, then there are tests available which do not make use of this assumption. Because the data are no ...

Figure 2: Q–Q (normal probability) plots compare the differences between two distributions by showing how their quantiles differ. ( a ) Probability plots for n = 40 noise samples and their box ...

When a dataset from a non-negative random variable contains zero or very small observations, the folded-normal distribution (FND) can be an appropriate model for fitting the data. Such data includes ...