...and counting

Topics: Model consumer demand (unit sold). Predict trends. Poisson and Negative Binomial distributions for counting discrete events.

Code: R / Tool: RStudio

The first case addresses the most common count regression models: the Poisson Regression and the Negative Binomial Regression models.

Consult the Tufte report in a new tab. A Tufte template is a clean format for written presentations.

The second case goes deeper with count regression models and their variations, adding tests and elaborating of flaws and remedies.

Consult the double case in a new tab (Show/Hide All Code in the case upper-right corner); and a note to learn where to apply count models.

The abacus or the ‘counting frame’ was instrumental to any great civilization. Etruscans, Greeks, Indians, Chinese, Aztecs, despite being far apart, all used the calculating tool years before Indian mathematician invented the Hindu numeral system before the 4th century. The later was adopted by the Arabic mathematician in the 9th century and spread to medieval Europe by the High Middle Ages. Nowadays, computers have relegated abacus to toys. Guess what we use to tally points at baby-foot?