Sample Size Calculation

What Does the Sample Size Calculation Service Include?

What is Sample Size Calculation?

When you hire our sample size calculation service, you will obtain much more than just a simple number. You will obtain a key tool to plan your research precisely, avoid methodological errors, and maximize the statistical validity of your results.

We specialize in clinical, epidemiological, and experimental studies, therefore we adapt each calculation to the specific characteristics of your design: whether it's a cross-sectional, cohort, case-control study, clinical trial, or a repeated measures experiment. We consider all relevant parameters, such as the type of hypothesis, the statistical significance level (α), the power of the study (1-β), the magnitude of the clinically relevant effect, the expected variability, and loss or non-response rates. Furthermore, if your study requires it, we include simulations of different scenarios so that you can evaluate how sample sizes vary under different assumptions. This will allow you to anticipate the necessary resources and present a solid justification to ethics committees or funding bodies.

In short, this service provides you with not only a precise sample size calculation, but also rigorous and personalized methodological support, which adds solidity to your research protocol, improves the presentation of your scientific project, and enhances your chances of success in calls for proposals, publications, and institutional evaluations.

Sample size calculation is a key component of the methodological design in clinical, epidemiological, and experimental research. An adequately calculated sample ensures the statistical validity of the results, avoiding both Type I errors (false positives) and Type II errors (false negatives), thus optimizing resources and time.

This service is aimed at those developing research protocols, theses, scientific articles, or grant proposals, and who need to rigorously support the sample size before ethics committees, funding agencies, or scientific journals.

As part of the service, you will receive a comprehensive technical report in PDF format, tailored to the specific characteristics of your study. This document will include the detailed development of the sample size calculation, along with all the statistical determinations used, explained clearly and supported by updated and relevant bibliographic references for your study design.

The report will also contain a brief paragraph written in scientific language, ready to be incorporated directly into the Materials and Methods section of your protocol, thesis, or manuscript. This will allow you to save time and ensure precise and methodologically sound writing.

Furthermore, upon request, a table of alternative scenarios (for example, with different power levels or margins of error) can be included, which is useful for evaluating the sensitivity of the design to different assumptions. The content is delivered in a structured, clear, and presentation-ready format for scientific committees, academic evaluators, or funding entities.

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