Rosamund - A/B Testing Analyst AI Skill

Name: Rosamund - A/B Testing Analyst AI Skill
Brand: KissMySkills
Price: 29.0 USD
Availability: InStock

Rosamund - Experimentation & A/B Testing Analyst Claude skill by KissMySkills, hardcover volume cover

$29.00

$29.00 $43.99

Rosamund - A/B Testing Analyst AI Skill

$29.00 this skill vs $43.99 hiring an A/B testing analyst

Complete skill package instant downloadrosamund-experimentation-ab-testing-analyst.skill

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Buy once $29 This one skill as a file. Yours forever, works in any AI chat. All-Access whole library $8.25/mo billed yearly All 1,000+ skills in the marketplace. Your AI picks the right one and loads it by itself. Claude, ChatGPT, Claude Code, Cursor · or $19 month to month

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⚡ Instant download ∞ Keep forever ✎ Written by us

Add it once. Your AI works like a specialist.

Add it to Claude, ChatGPT or Gemini - your AI works as a specialist in this field.

Instant download · 30-day money-back guarantee. Pay once, keep forever - no subscription. Written and tested by us, never scraped from GitHub. Refund policy

Ask Rosamund something hard.

📎 rosamund-experimentation-ab-testing-analyst.md LOADED ✓

Two-week test: variant +9% on Tuesday, -4% by Friday. PM refreshes the dashboard hourly asking if it's done. When is it done?

CLAUDE · AS ROSAMUND, A/B TESTING ANALYST It's done at the pre-computed sample size, not when the line looks good - swings from +9% to -4% in week one are textbook noise at small n. If nobody computed power up front, do it now: baseline rate, an MDE you'd actually act on, 80% power - that yields the end date, and my bet is 3-4 weeks, not Friday. Mid-flight, only integrity checks are legitimate: SRM on the allocation ratio, novelty effect in the returning-versus-new split, instrumentation parity between arms. And take the dashboard away from the PM - peeking is how +9% ships and 0% arrives. What was the planned MDE?

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You don't read it. Your AI does.

Add the skill file to Claude, ChatGPT or Gemini once. From then on it works as a specialist in this field and answers as Rosamund from the very next message.

Buy once and the file is yours to keep forever. Or subscribe to All-Access and let the KissMySkills connector load it, and every other skill, into your chat on request.

// what's inside

What's inside this skill

Validity check on how the test was built and run
Sample ratio mismatch and peeking diagnostics
A corrected read of what the result actually says
A clear ship, extend or rerun recommendation

Growth teams and product analysts about to ship a test on a shaky result

A senior experimentation / A-B testing analyst bills $132+/hr, the complete skill is yours forever.

// what's inside

What you're actually buying

Senior Experimentation & A/B Testing Analyst who checks how a test was built and run before trusting what the dashboard shows at the end.

Rosamund covers the full experimentation lifecycle: sample size and power calculation, minimum detectable effect (MDE) sizing, randomization unit and assignment integrity checks, sample ratio mismatch (SRM) detection, statistical versus practical significance, novelty effects and the peeking/early-stopping problem, guardrail metric design, and analysis pitfalls like Simpson's paradox and multiple comparisons.

Who it's for

Growth and product teams running A/B tests who need a pre-registered sample size, an SRM check, and a guardrail-metric readout before a launch decision, not a green p-value taken at face value.

Key capabilities

Sample size and runtime calculated from a stated MDE, baseline rate, and power before a test launches
Chi-square sample ratio mismatch check on the actual observed split before any result is trusted
Confidence interval and business-terms effect size reported alongside every p-value, never alone
Novelty-effect and peeking checks before a lift gets declared a durable winner
Guardrail metrics and subgroup Simpson's-paradox checks run before any ship recommendation

How to use it

Paste Rosamund's SKILL.md into your Claude Project Instructions (or any AI system prompt), then describe your Experimentation & A/B Testing Analyst problem. Works with Claude, ChatGPT, and any AI chat. Under 2 minutes to install.

// how to install Under 2 minutes

Four steps. Any AI chat.

01
Download the file
After checkout, the download link lands in your inbox. Save the file anywhere on your device.
02
Open your AI chat
Claude, ChatGPT, Gemini, Grok, or Copilot - whichever one you already use.
03
Paste the file contents
Drop it into the system prompt, Project instructions, or custom instructions field.
04
Start working
Your AI is now configured as a specialist. Ask it anything inside its domain.

No technical knowledge required. No subscription. Pay once, keep forever.

// compatible with

Works with every major AI chat.

Drop the file into your AI's system prompt, Project instructions, or custom instructions. No setup. No code. No vendor lock-in.

// faq

Questions about this product

What AI tools does this work with?+

Claude, ChatGPT, or any AI chat that accepts a system prompt or project instructions. Claude Projects gives the best results.

How do I install it?+

Paste the SKILL.md content into your Claude Project Instructions or your AI's system prompt. Under 2 minutes, no setup required.

Is this a course or a tool?+

It's a skill file, not a course. One file that turns your AI into a configured Experimentation & A/B Testing Analyst ready to work on your Experimentation & A/B Testing Analyst problem immediately.

Our test shows a winner but something feels off about it, what does Rosamund check first?+

She runs a chi-square sample ratio mismatch check on the observed versus intended split before trusting anything else, since a silent bucketing bug can invalidate the whole test while every downstream metric still looks plausible on the surface.

Do I have to read it myself?+

No. The file is written for your AI to read, not for you. Upload it or paste it in once and the AI takes on the role. After that you just ask it questions the way you normally would. You're welcome to open it and read it, but nothing here depends on you doing that.

Is this a physical book?+

No, it's digital. You download it the moment the order goes through and it's yours permanently. The cover is styled like a book because each edition is written and edited as one self-contained piece of work. The reading part is your AI's job, not yours.