+34 616 71 29 85 carsten@dataz4s.com

Statistical Data Analysis

Freelance Analyst

Learning statistics. Doing statistics. Hi, my name is Carsten. I’m Dane living in Spain with my wife and two children. For 20 years I have made a living out of sales, marketing, writings and startups. Lately, I am doing a self-study on mathematical statistics and R programming. Can I join you on my further learning path?


Hire MeView My Work


What impact do right decisions have? Let data support your decisions.

Decision A


Client satisfaction


Decision B


Client satisfaction




Regression Analysis. Inference about Regression. Multiple Regression. Non-Parametric Statistics. Time Series…

Tests & Estimations

Statistical Significance Tests. Confidence Intervals. Goodness of Fit. Sampling Design. Sampling. ANOVA…


Ph.D. Dissertations. Homework. Exam Prep. Students’ Projects. Online Teaching. Statistics in Excel…

Projects & Languages

PRINCE2 Certified. Statistical Environment in Excel. Spanish. German. English. Swedish. Norwegian. Danish.

Quality Control

Dynamic Documents


Statistical Testing


AB Split Test


Predictive Analysis


Excel Setup for Statistics

Excel Automation (VBA)

Google Analytics

What they say

These references point to my ‘earlier’ career before starting with statistical data analysis: 20 yrs within sales, startups and journalism. I trust that soon clients & partners related to statistical data analysis will join.

I headhuntet Carsten.

With his analytical skills he optimized our logistics and increased productivity throughout our organization. 

Carsten is a top professional knowing the art of converting highly complex concepts into simple solutions. He boosted our sales and developed our network of sales agents.

Peter Suurballe

Director, Acom Electric SL

As designer in Zapin, I worked very closely with Carsten who acted as interface between our clients and designers. Carsten worked out procedures for different processes. He dominated the demand specifications and was a strong communicator balancing client quality expectations with scopes of productions. A great professional and a good colleague.

Nina Fokdal

Global Gateways

Based on his sharp analytical skills, Carsten developed and implemented working procedures and systems. He built up the sales department from scratch. He achieved to streamline the company and the working procedures across the organization. As interface between our clients and our technical department Carsten …. ensuring our clients’ absolute satisfaction.

Claus Sorensen

CEO, spain-holiday.com

My notes on statistics

Here’s a directory of my notes on statistics. This is how I’m learning. Can they be useful for you too? Are you a learner, a teacher or a data professional? Each page has a comment module. Thanks for your comments! Soon, I will be uploading +100 exercises and real life cases with step-by-step solutions.


Statistical programming

At deep sea. Learning R statistical programming. Shore at sight thanks to human faculties as patience, persistance and two books like ‘Hands on R Programming’ by Garret Grolemund and ‘R for Data Science’ by Hadley Wickham & Grolemund. The Rstudio community and many others are greatly helpful too. VBA, MySQL and html basics. And Python? Maybe one day.

+34 616 71 29 85

Call me

Spain: Ctra. 404, km 2, 29100 Coín, Malaga


Denmark: c/o Musvitvej 4, 3660 Stenløse

Drop me a line

What are you working on just now? Can I help you, and can you help me? 

About me

Learning statistics. Doing statistics. Freelance since 2005. Dane. Living in Spain. With my Spanish wife and two children. 

What they say

20 years in sales, analysis, journalism and startups. See what my customers and partners say about me.