A/B Testing and Experimentation Certification

The A/B Testing and Experimentation Certification is a free 20-minute skill test from Science of Apps. It tests rigorous online experimentation — hypotheses, randomisation, sample size and power, significance, guardrails, peeking, SRM, novelty effects and interpreting results. Score 70% or more on its 20 questions to earn a verifiable A/B Testing and Experimentation certificate (SOA-ABT). Every question is based on published standards and research — including Trustworthy Online Controlled Experiments (Kohavi, Tang & Xu), How Not To Run an A/B Test (Evan Miller) — and each answer is explained with its source.

Read the four skill areas on this page, then take the 20-minute test online — no fee, course or sign-up. You see every answer explained when you finish. Score 70% or more and you get a A/B Testing and Experimentation certificate straight away, on screen, as a PDF and by email, with a credential ID anyone can verify.

Yes. The questions are original scenarios written by Science of Apps, and each one is based on a public source you can read: Trustworthy Online Controlled Experiments (Kohavi, Tang & Xu); How Not To Run an A/B Test (Evan Miller). The source is shown under each question and linked in the answer review. Science of Apps doesn't copy questions from other tests.

Four skill areas with five questions each, drawn from a bank of 10 per area so a retake brings new questions: Designing experiments (Hypotheses and metrics, Randomisation and Sample size and power); Analysing experiments (Significance and intervals, Pitfalls: peeking, SRM and Decisions and guardrails); Advanced experiment design (Variance reduction (CUPED), Sequential testing and Multi-armed bandits); Experimentation programmes (Experiment culture, Interference and network effects and Ethics and trust). Every question is an original scenario based on a published standard, official documentation or research, named under the question.

Data scientist, Product analyst, Growth marketer, CRO specialist and Product manager. It suits anyone who wants a quick, verifiable way to show A/B Testing and Experimentation skills, from students and career switchers to experienced professionals.

Yes. The test is online, in English and free everywhere — people take it from India, the US, the UK, Europe, Africa, Latin America and Asia-Pacific. Your certificate is dated with your own local date and can be verified from anywhere at scienceofapps.com/certification/verify/.

20 questions — 5 from each of 4 skill areas — with a 20-minute limit. You need 70% (14 of 20) to pass and 90% for distinction.

We rate it Advanced: assumes years in the role or deep specialist knowledge. It has 20 scenario questions — 5 from each of 4 skill areas — and a 20-minute limit. You need 70% (14 of 20) to pass and 90% for distinction.

A/B testing interviews in 2027 test whether you can run experiments that don't fool the company: a clear hypothesis and metric, correct randomisation, sample size and power, guardrail metrics, and the pitfalls — peeking, sample ratio mismatch, novelty effects and interference. Product analysts, data scientists, growth and CRO roles all test it. Learn the design checklist, practise interpreting messy results, and prove it with a verified test and one written-up experiment. Our full career guide covers the hiring process, interview loop, pay and a prep plan: scienceofapps.com/blog/ab-testing-career-guide/

Nothing. There is no fee to take a test, to receive the certificate, to have it emailed or to verify it, and no sign-up.

On our server, not in your browser. The answers never reach the page until you submit, so a certificate can only be earned by passing. Each certificate gets a unique credential ID stored by Science of Apps.

You see your score for each area and every question with the correct answer and why, with the published source behind it. You can retake after 30 minutes, and the retake draws questions you haven't seen yet.

No. Every certificate is dated, so it always shows when you passed. Retake a test any time for a newer date or a higher score.

Yes. After you pass, Add to LinkedIn opens the Licenses & certifications form with the certificate name, Science of Apps as the issuer, the issue date, your credential ID and the verification link filled in. You can also download it as a PDF or PNG, and it's emailed to you as a PDF.

Every certificate has a credential ID and a QR code. Scanning it, or entering the ID at scienceofapps.com/certification/verify/, shows the holder's name, the certification, the score and the issue date from our records.

No. They are Science of Apps' own assessments of applied skill. They aren't issued by a university or standards body, and they work best alongside a portfolio that shows the skills in real work.