Ten volumes, 124 days of fifty minutes. Every idea arrives three times: in plain language, as a picture you can move with your own hands, and as the formula an exam will ask you to compute. Built to clear UGC NET and PhD entrance papers on the way past — not as the destination.
This is the central limit theorem, the idea every inferential test stands on. Textbooks assert it. Here you draw the samples yourself: pick a violently non-normal population, set n small, and watch the distribution of the sample mean refuse to care. Then set n = 4 and watch it care very much.
The primer gives you the intuition — twelve short sessions, one everyday metaphor each, no algebra. The software reference gives you the clicks, so that “run a Welch t-test” is never the part that stops you.
One to three build the reasoning; four to five are the tests that run most published psychology; six to seven are what measurement and latent-variable work demand; eight and nine are where PhD-level work actually lives. Each volume keeps its own progress in this browser.
UGC NET Psychology, most university PhD entrance papers and MPhil screenings draw from the same eleven areas. This maps each one onto the days that cover it, so revision can be targeted rather than anxious.
| Syllabus area | What it asks | Taught in |
|---|---|---|
| {{ e.unit }} | {{ e.what }} | {{ e.where }} |
Type a term, a test name, or the thing you half-remember. Results tell you what it means in one line and which day teaches it properly.
Arithmetic on the real minute estimates in these volumes. Pick a pace; the figures update against whatever you have already ticked.