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…Category: Statistics in Data Science and Analytics
Why are people losing at the casinos? Why shouldn’t you buy a lottery ticket? How do you account for uncertainty when you invest a smaller or bigger amount…
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……
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…
100% practical 6-week data science challenge & video course — simulating of being a junior data scientist at a true-to-life startup.
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…
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…
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…
Last week I promised to continue with the second Part of Predictive Analytics 101. If you haven’t read Part 1, please do that here: Predictive Analytics 101 Part 1….
Predictive analytics is not a new or very complicated field of science. As I mentioned before, it’s easy for anyone to understand at least the essence of it….