This subgroup of dangerous job advertisements has a common denominator: ignorance, in one case amplified by a generative artificial intelligence initialized with an input as vague as the ignorance of the person who wrote it. In almost all cases it is a question of lack of knowledge, in some cases presumption of knowing how to …
What does it mean to have a data stack? To understand it we need to start from something a little more known. By industrial chemical plant we mean a site that has a storage of one or more raw materials, a reactor, a storage of the finished product with an attached distribution system, leaving out …
In this article you will understand the importance of exploratory statistics. In Formula One they do tests, before the race. The drivers study the track: how to enter the curves, they identify possible pitfalls, difficulties, etc. When a location is thought to host oil, the site is explored using geophysical and nongeophysical techniques, and then …
Exploratory statistics: from familiar coast to new lands Read More »
First of all, here by data we mean processed data, possibly twice, so knowledge. Beware: without this clarification we risk making decisions on raw or not refined enough data (descriptive statistics). What differentiates relying on data versus being informed by data? The decision-making weight of processed data. Using a metaphor, in the former case the …
Data driven companies or data informed companies? Read More »
Part of the clients I had, had employees or managers, on the corporate team, who already knew how to use Excel or Google spreadsheets, even with intermediate skills. They understood that a statistician would allow them to make a quantum leap. In general, having a specialized, or verticalized, person in a field gives benefits. The …
Why you need to hire a statistician, data scientist, as an employee Read More »
As the most basic part of matter we know atoms, quarks some nitpickers would say . These can organize into molecules, via energy. These molecules can organize further, by other energy, to become minerals. These minerals can become rocks. However, to get metallurgical value from that last material, it will need to be separated chemically, …
The Italian National Institute of Statistics (ISTAT) provides mortality tables, so a useful demographic resource for citizens to understand how life expectancy varies by age, region, province, etc. (conditional average). There is also the variation by occupation, educational qualification. Then there are also studies, not from ISTAT, that explain life expectancy as a function of …
Remember that you have to die: economics data science Read More »
Big data is part of that inflated set of words from the previous decade. There are various answers to this question, depending on the tool you use to do data analysis, and from the informality. When spreadsheets crash, that is, they suddenly close or are unusable because they are too slow. Despite the fact that …
Yet another time you will see me say that in statistics 80% of the time is used for obtaining and cleaning data and 20% for the fun parts like data dashboards and models. If we want to make descriptive statistics thanks to an aggregation of the vertical lookup, =VLOOKUP both on Excel and on Google …
How dirty data doesn’t make the vertical lookup work Read More »
Introduction One of the objectives of statistics is to explain the variability of a phenomenon of interest, through a mathematical expression, i.e. an equation called a model, made up of an objective (dependent) variable and explaining (explanatory, independent) variables. . If the target variable has no variability, then we do not have a variable but …
How to recognize a computer scientist doing statistics and why you need to be careful Read More »
