BzST | Business Analytics, Statistics, Teaching

With the recent launch of  Amazon Forecast , I can no longer procrastinate writing about forecasting "at scale"! Quantitative fo...

Quantitative forecasting is an age-old discipline, highly useful across different functions of an organization: from  forecasting sales and ...

Visualizing a time series is an essential step in exploring its behavior. Statisticians think of a time series as a combination of four comp...

Image from www.lumaxart.com The 2010 INFORMS Data Mining Contest is underway. This time the goal is to predict 5-minute stock prices. Th...

Here's another interesting example where explanatory and predictive tasks create different models: econometric models. These are essenti...

Those who've been following my postings probably recall "competition season" when all of a sudden there are multiple new inter...

In his most recent newsletter, Stephen Few from PerceptualEdge presents a short and interesting article on Cycle Plots (by Naomi Robbins)....

The boxplot is one of the neatest visualizations for examining the distribution of values, or for comparing distribtions. It is more compact...

There is a host of metrics for evaluating predictive performance. They are all based on aggregating the forecast errors in some form. The tw...

I love data-mining or statistics competitions - they always provide great real data! However, the big difference between a gold mine and ...