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…Page 2 of 4
Why become a data scientist? From time to time, I get this question from people who are flirting with the idea of becoming a data professional. Since you…
As I have mentioned several times, Data Science has 3 important pillars: Coding, Statistics and Business. To succeed, you have to be well-versed in all three. In this…
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!
Remember that I told you last time that Python if statements are similar to how our brain processes conditions in our everyday life? That’s true for for loops…
We use if statements in our everyday life all the time – even if our everyday life is not written in Python. If the light is green then…
It’s fair to say that using functions is the biggest advantage of Python. Or at least you will use them a lot during your Data Science projects! This…
“Should I learn Python 2 or Python 3?” For everyone who has just started to learn Python for Data Science, this is an important initial question to answer….
You might have heard that Data Scientist was ranked as the best job of 2017 in the USA (based on Glassdoor’s research). Recently many IT professionals have started…
Where we did we leave off? Oh, right, we learned about how to use variables in Python. Here is the second essential topic that you have to learn…
Read these 7 free articles about Bash/Command Line and take your very first step to learn the basics of coding for Data Science!
If you are learning Data Science, pretty soon you will meet Python. Why is that? Because it’s one of the most commonly used data languages.It’s popular for 3…
In the last 2 weeks I’ve introduced 9 common statistical bias types. If you went through them, you have already taken the first very important step towards overcoming…
It’s time to continue our discourse about Statistical Bias Types. This is part 2 – if you missed part 1, read it here: Statistical Bias Types part 1….
Humans are stupid. We all are, because our brain has been made that way. The most obvious evidence of this built-in stupidity is the different biases that our…
The usefulness of visualisations in data analysis is often questioned. At the end of the day, the outcome of the analysis should be quantifiable, right? Well, maybe. But…
This is the final episode of the SQL for Data Analysis – Tutorial for Beginners series. Today I’ll show you some more advanced SQL moves! Though junior data…
Wouldn’t it be good to know where most of your traffic is coming from? What about email sign ups or even revenue broken down by social channels? How…
This is kind of a special blog post, because here I’m sharing 3 videos from my brand new O’Reilly Video course – called Data Science Fundamentals for Marketing…
Creating heatmaps is a simple and efficient way to analyze your website visitors’ interactions and your users’ behavior on your website. If you are running an online business…