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
It’s fair to say that using functions is the biggest advantage of Python. At least you will use them a lot during your Data Science projects! This is…
“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…
In the last 2 weeks I’ve introduced 9 common statistical bias types. If you went through them, you have already done the first very important step to overcome…
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 blogpost, because here I share 3 videos from my brand new O’Reilly Video course – called Data Science Fundamentals for Marketing and Business…
Heatmapping is a simple and efficient way to analyze visitor interaction and user behavior on your website. If you are in a Conversion Rate Optimization (aka. CRO) project…
Combining tables is a key component of data analysis. And SQL is really good at it! Of course each case is different, but I’ve run into analytical tasks too…
You have already learned a lot about the basics of SQL for data analysis. I figured now would be a nice time to have an episode focusing only…
Today I’ll show you the most essential SQL functions that you will use for finding the maximums or the minimums (MAX, MIN) in a data set and to…
“How do I optimize Facebook campaigns?” This is the question that I hear all the time from clients to whom I teach Facebook marketing. Of course, it depends…
This is the second episode of my SQL for Data Analysis (for beginners) series, and today I’ll show you every tiny little detail of the SQL WHERE clause….
In my previous SQL for data analysis tutorial, I briefly mentioned that I prefer SQL Workbench over pgadmin4 for SQL querying. Today I will show you how you can install it…