Tools

The Statistics Toolbox

All the tools that work alongside the lessons, in one place. You can pick the right test, look up critical values without a textbook appendix, convert effect sizes, analyze your own data and check what you've learned. Everything is free with no sign-up, and nothing you paste here leaves your browser.

Capybara pro-tips

  • Press / anywhere (or Ctrl/⌘ K) to search every lesson and tool. It searches full lesson text, not just titles, and on a lesson page ← and → jump to the previous and next section.
  • The formula sheet and the lessons are made to print. Press Ctrl/⌘ P and the navigation disappears, leaving clean study notes.
  • Your progress is stored in your browser. Finished lessons show fainter in the lists, courses show a progress ring, and the homepage offers to resume where you left off. There is no account, none of it leaves your browser, and clearing your browser data resets it.
  • Every statistic here is exact. The calculators use the same special functions as statistical software, checked against published critical values and G*Power, and not textbook approximations.

A suggested workflow for an assignment: ① not sure what analysis you need? Start at Which test should I use? → ② open the linked interactive lesson to understand it → ③ run it in SPSS/JASP with the lesson's step-by-step box → ④ get the exact p-value or critical value from the tables → ⑤ report it with the lesson's APA example and an effect size from the converter. The capybara has never once panicked on a deadline this way.

The thesis pathway

The steps of a research project in order, from a first question to a finished, ethical write-up. Each step links to a course or tool, most of them in the Research Toolkit track.

  1. Design the study. Turn a question into a testable hypothesis: Methods · From Question to Hypothesis.
  2. Collect & clean the data. Get it tidy before you touch a test: Data · Tidy Data.
  3. Run the right analysis. Pick the test with Which test should I use?, then learn it in the Statistics Core.
  4. Check you had the power. Enough participants to detect your effect: Power & Sample-Size Calculator.
  5. Report it properly. Structure, APA numbers, figures that do not mislead: Writing · The IMRaD Structure.
  6. Do it all ethically. Consent, integrity, and open science throughout: Ethics · Why Research Ethics Exists.

Missing a tool you wish existed? New tools are added over time. Say hi and tell me what would make your stats work easier.