🧮 Free for students
Free Research Tools
Quick answers to two questions every thesis student asks: “How big should my sample be?” and “Which test should I use?”
🧮
Sample Size Calculator
Cochran, Yamane and Krejcie & Morgan in one place — with non-response adjustment and a ready sentence for Chapter 3.
Open the calculator →🧪
Statistical Test Chooser
Answer three simple questions about your study and get the right test — plus the non-parametric alternative.
Find my test →🤝 Need help with SPSS & Data Analysis?
Tell us your topic, level and deadline. We reply with a clear plan and price — nothing is charged before you agree.