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Blocking

Blocking in statistics allows you to control the sources of variation (” non-essential variables”) by creating blocks (homogeneous groups). The treatment is then assigned to the different blocks. blocking is a term that comes from...

Advanced Product Quality Planning Engineer (APQP)

Complex supply chains and products can lead to many failures, especially when new products are launched. Advanced Product Quality Planning Engineer (APQP), a structured process, is designed to ensure customer satisfaction with new products and processes. APQP has been...

Anderson-Darling Normality Test

The Anderson-Darling normality test is one of the three general normality tests that can detect deviations from normality. Although it is often referred to as the strongest test, there are other tests that can be used. The other two tests have comparable...

Bartlett Test

Bartlett’s Test in r, a hypothesis test, is used to determine if there is a statistically significant variation between two or more independent sets of normally distributed continuous data. This test is useful in determining whether particular groups or strata...

Attribute Data

There are two types of data: things that we measure and things that we count. Continuous data is data that can be derived from measuring things. Continuous data can be defined as any data that is measured by a measuring device (e.g. stopwatch, scale, tape measures),...