Very short time periods (6 months) with several crashes, as well as long time periods (3 years) with no crashes are expected. An even distribution of plane crashes is indeed NOT expected - it would look very suspicious, and definitely not random. Here we assume that all events (plane crashes) are independent. We also assume that the average is two major plane crashes per year - which is realistic if you include all passenger airlines flying anywhere in the world - sometimes in dangerous…

Guest blog post by Mike Kennedy, from Talent Analytics.

The importance of finding the right employee from the start may seem like common sense, but is there a smarter way to reduce the time and money you spend hiring staff?

The answer is data, according to Greta Roberts, chief executive officer and…

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INFORMS…

by Elliott Cordo, chief architect at Caserta Concepts. Exclusive to Data Science Central.

There is much discussion these days about Lambda Architecture and its benefits for developing high performance analytic architectures.  It offers a combination of a high performance, low latency ETL with a real-time layer, and a slower, more accurate, and flexible solution that runs in batch.  

As I work…

Guest blog post by Dr. Livan Alonso. 

Twitter has more than 250 million monthly active users who tweet more than 500 millions tweets per day. In the case someone is following many people, it isn’t feasible to read each tweet from them.

Do you have any idea about what people are twitting about Data Science, Big Data, Business Analytics, Hadoop, Machine Learning or R programming?

Word clouds are one of the simplest and most intuitive ways of visualizing text data.…

What are the differences between data science, data mining, machine learning, statistics, operations research, and so on?

Here I compare several analytic disciplines that overlap, to explain the differences and common denominators. Sometimes differences exist for nothing else other than historical reasons. Sometimes the differences are real and subtle. I also provide typical job titles, types of analyses, and industries traditionally attached to each discipline. Underlined domains are…

The full version is always published Monday. Starred articles are new additions or updated content, posted between Thursday and Sunday.

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Should you use linear or logistic regression? In what contexts? There are hundreds of types of regressions. Here is an overview for data scientists and other analytic practitioners, to help you decide on what regression to use depending on your context. Many of the referenced articles are much better written (fully edited) in my data science Wiley book.…

This article is co-authored with Dr. Livan Alonso Sarduy. The two charts below are based on a number of Twitter followers and their growth rate, after filtering out irrelevant or fake followers. Our next step is to identify top data science Twitter accounts, that are themselves followed by many other top data science Twitter accounts: in our opinion,…

The full version is always published Monday. Starred articles are new additions or updated content, posted between Thursday and Sunday.

Featured Articles

• This Just In: How Big Data is Changing Journalism *…

Here are 10 rules to design great, simple, efficient, adaptive dashboards.

1. Decide which metrics should be included in your dashboard. Some metrics such as measuring the impact of sharing and likes, on email marketing campaigns, are not easy to estimate. Out-of-dashboard statistical modeling might…

The full version is always published Monday. Starred articles are new additions or updated content, posted between Thursday and Sunday.

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• Attend Predictive Analytics World for…

Guest blog post by Carla Gentry (@data_nerd), initially posted here.

Below are 30 of the top stats that can help you either sell social media to the higher ups in your company or help you in securing additional resources for your company’s social program.

• 5 percent of online shoppers note that social media influenced them to visit…

There are many lists of top data scientists on Twitter. Here we mention and comment one of them, published on BigData-MadeSimple; most other lists have similar drawbacks. It has been argued that the overlap between my Top 25 data scientists on LinkedIn and the Twitter…

The full version is always published Monday. Starred articles are new additions or updated content, posted between Thursday and Sunday.

Featured Articles

• Beyond The Visualization Zoo *…