Machine Learning and Classical Statistics

Machine learning is mentioned frequently in the media. How is it different from classical statistics? How is it similar? We found it best to learn about this from Brian Caffo, a Ph.D. in statistics who also has expertise in computing algorithms. Brian is a professor of biostatistics at John Hopkins University. Brian uses both machine [...]

Multivariate Testing (Experimental Design) vs A/B Testing

You may have heard of A/B Testing and Multivariable Testing (Experimental Design) in terms of website optimization to maximize conversions among other goals. What are these testing regimens? When should you use them? A/B testing is just that — testing one configured webpage (A) against another (B) and analyzing which is best. Multivariate testing (MVT) [...]

Readability Statistics

If you are in Quality, Lean, or Six Sigma, you will write procedures. How can you check that your documents are written at a maximum grade level to ensure that everyone can comprehend them as intended? The answer is readability statistics. What are readability statistics? They are formulas that rate your documents and give a [...]

Statistical Tolerance Intervals: Definition, Use, and Calculation

In this blog, we will see how statistical tolerance intervals can be applied to infer the proportion of individual products within a population. We take a representative sample from a population, compute sample statistics, and make an inference about a population parameter. The most familiar sample statistic is the sample mean. That is used to [...]