The previous example illustrates how you can create R charts using raw data (process measurements). However, in many applications the data are provided as subgroup summary statistics. This example ...

For example, in Table A.1 the range for operator George, part 1 is calculated as 0.65 - 0.60 = 0.05. Similarly computed ranges are displayed for each operator and each part. You should investigate out ...

2 types of variation and how we distinguish between common and special cause variation, along with how to create a rational subgroup. We also cover the equations and constants for the X-bar and R ...

When it comes to all-electric cars, their driving range varies a lot between the models, depending on efficiency and battery capacity. The Department of Energy (DOE)’s Vehicle Technologies Office ...

Tallying is a way of recording data that counts in groups of five. The data is tallied as it is counted, with a mark for each piece of data, and then the frequency is recorded at the end. Frequency ...