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Data Analysis Data Cleansing Data Entry Excel Risk Management
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Ann-Christin B.

@annearcana

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5,0
3

2,2

2,2

67%

Excel | VBA | Python | Models & Data Analysis

$65 USD / Stunde

Flagge von

Germany (7:01 PM)

Joined on September 28, 2025

$65 USD / Stunde

I build Excel models, BI tools and automated data workflows that explain why your numbers behave the way they do. Most dashboards show results. I focus on performance drivers, decision logic and reproducible calculations behind them. With a background in Industrial Engineering, Psychology and Lean Six Sigma Black Belt, combined with advanced training in Data Science, Statistical Inference and Python, I bring together: • Business Intelligence & KPI analysis • Statistical analysis & hypothesis testing • Process & root cause analysis • Excel/VBA model building & automation • Python-based data workflows What I typically build • Decision models & calculators (pricing, risk, capacity, forecasting) • Advanced Excel workbooks with structured logic & clean formulas • KPI & performance driver analysis (what actually drives results?) • Statistical evaluations (A/B tests, significance testing, variance analysis) • Automated data pipelines (Excel, Power Query, Python) • Operational dashboards with analytical depth (not just visuals) My approach I don’t just deliver files — I build tools you can use long-term: • Clean, structured and documented models • Transparent formulas & logic (fully adjustable by you) • Reproducible data workflows • Clear interpretation of results (not just charts) • Short executive summaries: what the data says — and what it doesn’t Typical results for clients • Better pricing and margin decisions • Clear understanding of performance changes • Reduced manual work through automation • Reliable decision tools instead of ad-hoc spreadsheets • More confidence in business decisions based on data Working with me • Structured communication & clear milestones • Fast understanding of complex requirements • Strong focus on data quality and model logic • Reliable delivery and iterative refinement If you need an Excel model, calculator, BI tool or analytical workflow that actually supports decisions, feel free to reach out.

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Pünktlich

100 %

Im Budget

100 %

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83 %

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Portfolio

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13728144
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5.0 · 3 Rezensionen
Bewertungen
N

Dynamic Excel Pricing Link Setup ₹7.500 INR

She communicate well, she may give you the cheap quote, But She will understand your project and what about the delivery of project . It will never happen. She will take your all the energy in understanding everything but can cancel your project at the time of delivery day rather communicating a problem and solution she will cancel it. It's total harrasment. Think about twice thrice before hiring

Neel S.

@nandmdezine

Flagge von

Gurgaon, India

vor 17 Tagen

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LibreCalc Stock Position Sizer $150 AUD

I selected Ann-Christin for my project because of her Excel qualifications and skills. Her communication skills are excellent and she contributed to the project by asking questions like how I wanted the workbook to calculate and function. Ann-Christin was responsive and reliable in making changes to the workbook to ensure that it met all my performance requirements. I would be happy to collaborate with Ann-Christin again should the need arise. Thanks to Ann-Christin, I now have a robust and user friendly workbook.

Frank S.

@franks572

Flagge von

Bonville, Australia

vor 1 Monat

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R

Medical Writing Lead Generation £20 GBP

Ann-Christin did a great job.

Robyn D.

@robyndwrite

Flagge von

Folkestone, France

vor 3 Monaten

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Erfahrung

BI & Statistical Performance Analyst

Sept., 2025 - Aktuell

5 Monate, 7 Tage

Self-Employed / Freelance

Sept., 2025 - Aktuell

5 Monate, 7 Tage

Freelance Business Intelligence & Data Analysis Excel & VBA Automation Projects Statistical Data Analysis & Reporting Dashboard & KPI Analysis for SMEs

Sept., 2025 - Aktuell

5 Monate, 7 Tage

Bildung

Fernuniversität Hagen

2012 - 2020

8 Jahre

B.Sc. Psychology

Flagge von

Germany

2012 - 2020

8 Jahre

Hochschule der Medien Stuttgart

2005 - 2009

4 Jahre

B.Sc. Industrial Engineering

Flagge von

Germany

2005 - 2009

4 Jahre

Qualifikationen

Master Statistics with Python

2026

Codecademy

Skill Path

2026

Data Scientist: Inference Specialist

2026

Codecademy

Career Path

2026

Data and Programming Foundations for AI

2026

Codecademy

Skill Path

2026

Zertifizierungen

SQL - Level 1

SQL

US English - Level 1

US English

Data Entry

Data Entry

Python Level 1

Python

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