Now, let's tackle the task of finding the indicated z-score shown in a graph. This usually involves being given an area under the standard normal curve and needing to find the corresponding z-score.

Choosing the right way to visualize your data makes the difference between telling a clear, compelling story or creating cognitive overload. Here's how to pick. Data is best understood when presented ...

What is non-normal data? Normally distributed data is a commonly misunderstood concept in Six Sigma. Some people believe all data collected and used for analysis must be distributed normally. But ...