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Best Practices for the experiments
We all use experiments for data-driven decision-making, whether it’s product changes, marketing tweaks, or research.
Jan 14
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Eltsefon Mark
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Happy 2026
This year changed a lot for me.
Jan 2
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The right mindset to get a data scientist interview
If you’re preparing for data science interviews and feeling frustrated, exhausted, or questioning your self-worth after a rejection - this post is for…
Dec 12, 2025
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Eltsefon Mark
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Interpretation does matter
Interpreting experiment results, whether you’re building a product, running a marketing campaign, or doing research, can be tricky.
Nov 12, 2025
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3
How Not to Turn Your 1:1 into a 0:0
1:1s can be the most rewarding meetings - but they can also be wasted time.
Oct 17, 2025
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Eltsefon Mark
7
When intuition wins over A/B test?
When making choices that affect products, policies, or strategies, it’s important to understand not just what the data says, but how much trust we can…
Oct 1, 2025
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6
What actually speed up your A/B Test
We all want to speed up our A/B tests and run them as fast as possible.
Sep 17, 2025
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7 reasons why your experiments fail
When you first start working with experiments, it feels simple:
Aug 27, 2025
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Data Marks
A newsletter dedicated to talking about data science, experimentation and how to pass the mark.
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