Sample Size Calculation for Research

Ensure Your Study is Adequately Powered for Success

A robust sample size calculation is the foundation of credible and ethical research. At Thesis Writing Cafe, our expert biostatisticians provide precise sample size and power analysis to ensure your study is capable of detecting meaningful effects, saving you time and resources.

PhD-Level Statisticians

Grant & Thesis Expertise

Accurate & Defensible

Our Sample Size Calculation Services

Number 1
Sample size for clinical trials (superiority, non-inferiority).
Number 2
Sample size for surveys and observational studies.
Number 3
Calculations for comparing means, proportions, and other endpoints.
Number 4
Power analysis to determine the probability of detecting an effect.
Number 5
Justification of sample size for grant proposals and ethics committees.
Number 6
Guidance on using software like G*Power and R for calculations.

Why is Sample Size Calculation Crucial?

Ethical Considerations

An appropriate sample size ensures you do not expose participants to unnecessary risk in an underpowered study.

Resource Efficiency

Avoid wasting time, money, and resources on a study that is too large or too small to produce meaningful results.

Scientific Validity

A study with an adequate sample size has sufficient statistical power to detect a true effect, making your findings more reliable.

Publication Success

High-impact journals and funding agencies require a robust justification for your sample size. We help you meet their standards.

Our 4-Step Process

1

Submit Requirement

Share your research area and specific needs through our consultation form.

2

Get Quote & Plan

Receive a customized plan and a detailed quote for your project.

3

Collaborate with Expert

Engage in one-on-one sessions with your dedicated academic mentor.

4

Receive & Review

Get your completed chapters, provide feedback, and request revisions.

What Researchers Say

★★★★★

"I was struggling with the sample size justification for my grant proposal. The consultant provided a clear and robust calculation that was accepted without any questions. A fantastic service."

- Dr. Priya Sharma, Principal Investigator

★★★★★

"The team at Thesis Writing Cafe helped me determine the right sample size for my complex experimental design. Their expertise was evident, and the process was quick and professional."

- Rohan Mehta, PhD Candidate

★★★★★

"The power analysis they conducted was crucial for my dissertation. It gave me the confidence that my study was adequately powered to find a significant result. I highly recommend their statistical support."

- Dr. Anjali Verma

15+
Years of Experience
5,000+
Happy Clients
8,000+
Projects Completed

Our Location

Ready to Determine the Right Sample Size?

Ensure your research is built on a solid statistical foundation. Contact us for a free, confidential consultation with a biostatistics expert.

Explore Our Other Academic Services