Hey, I'm Tomi Mester. This is my data blog, where I give you a sneak peek into online data analysts' best practices. You will find articles and videos about data analysis, AB-testing, research, data science and more…
100% practical 6-week data science challenge & video course — simulating of being a junior data scientist at a true-to-life startup.
Learning SQL is very useful for anyone in the online world. And it’s a definite must for Data Analysts/Scientists! Here are 8 articles to start with…
I put together a ‘Python 3 for Data Science’ tutorial series starting from the very basics. It features 9 practical articles – that covers everything you need to know!
Read these 7 free articles about Bash/Command Line and take your very first step to learn the basics of coding for Data Science!
Recently, I had the “pleasure” of setting up my work computer (the computer that I use exclusively for data science projects) from scratch. I have a 2016 Macbook…
Working with current dates and times in data science projects is quite common. In this episode of my SQL tutorial series I’ll show you the best functions that…
In this episode of the SQL tutorial series you’ll learn two simple but important commands that you’ll use frequently when working in SQL: TRUNCATE TABLE and DROP TABLE….
In my previous article about statistical averages, we discussed how you can describe your dataset with a few central values (mean, median and mode). That’s well and good……
I always say that learning linear regression in Python is the best first step towards machine learning. Linear regression is simple and easy to understand even if you…
In this article I’d like to answer a very simple question — that I get a lot. It’s this:What is data science? The question is simple, sure… But…
This is the second episode of my web scraping tutorial series. In the first episode, I showed you how you can get and clean the data from one…
Running hobby projects is the best way to practice data science before getting your first job. And one of the best ways to get real data for a…
I get this question a lot: What’s the best computer (or laptop) for a data scientist? In this article, I’ll answer it in detail and I’ll add specific…
In my previous landing page A/B test case study, I promised to get back to you with a few A/B testing misconceptions. In this article, I’ll share three…
Today, I’d like to give you an insight into an A/B test that I recently ran on my own blog, data36.com. In the last few years, the Data36…
Many companies are using A/B testing. But not too many of them are using it successfully. I mean, yeah, everyone has a few winning A/B tests that she…
A few years ago we were running a major homepage A/B test with one of my clients. Huge traffic, huge potential, huge expectations — and huge risk, of…
We all know the old catch-22 — you need a job to get job experience and job experience to get a job. Luckily, that’s not entirely true in…
Data Science is trending! Year by year more and more online businesses start their first data science projects, build up their data teams, hire more data scientists and…
Doing Data Science without a sense of business is like playing chess without the kings on the board. For every business, making its products or services better is…
Did you flirt with the idea of learning data science? You are not alone. This has been a really hot topic in the last few years and it…
This is a guest post from Ben Collins – freelance data analyst and developer, and founder of The Collins School of Data. What is Google Data Studio? Data…
Not so long ago, I saw one of my data scientist friends speak in front of his whole company. He worked for two months on a great data…
A few years ago, I put a lot of work into a hobby project of mine: a self-learning Python chatbot that learns like a newborn baby. It was…