Stat Study Hub makes statistics easier to learn with simplified explanations, worked examples, and free calculators that help you check each calculation.
Learn the idea first, see how it works in an example, then use the right calculator to verify your answer and understand the result.
Choose a topic to find simplified explanations, worked examples, assumptions, interpretation guidance, and practical reporting help.
Read our latest simplified guides for understanding statistical concepts, methods, assumptions, interpretation, and reporting.
A one-proportion z-test is one of the hypothesis tests used to determine whether a sample proportion is significantly…
Read article
When performing a hypothesis test for a sample mean where the population standard deviation is known, or when…
Read article
When reading survey results, especially in published work, you might come across a percentage followed by a ±…
Read article
The population mean is the average value of all the observations in the entire group you want to…
Read articleOur free statistics calculators give you quick answers and calculation steps so you can check your work after learning the method. Browse the calculator library when you are ready to apply a formula or verify a result.
A correct calculation is only one part of statistics. Our guides help you understand why a method is appropriate, what its assumptions mean, and how to interpret the result.
The calculators support that learning by helping you verify the arithmetic and follow the calculation steps without replacing the reasoning behind the analysis.
Understand statistical ideas in direct language before applying formulas.
Follow complete examples that connect the calculation to interpretation.
Learn what to check and how to make an evidence-based conclusion.
Turn numerical output into clear findings for coursework and research.
Start with a simplified statistics guide when you need to understand the method, or open the calculator library when you are ready to check a calculation.